This year, Mitchell was slated to ride the whole outdoor season on the TLD KTM Team, rather than entering the season with a try-out status. He rode with much more consistency, and with the injuries and other issues of his teammates, was the top finishing rider on the team. He finished 10th in the 250 championship, in a year that saw nearly 20 riders with high levels of support. He was in the top ten regularly with his best moto finish being a 7-7 at High Point. He goes into the 2017 season as a full member of the TLD KTM Team.
2017 Oh what might have been for Mitchell in the 250 West championship. After finishing a strong 4th at the opener, he was injured in Round 2. Coming back for the last three rounds he finished 3rd and 2nd in the 250 West rounds, then 5th in the combined Vegas round. Despite missing 5 of 9 rounds, his strong finishes got him to 10th in championship. He went into the motocross season healthy, on a great team, and ready to compete at the highest level. After a going 6 12 at Hangtown, he was hurt at Round 2, and despite some hopeful announcements, never appeared in any other rounds. In mid-October, it was announced that Yamalube/Star Racing Yamaha had signed him to a two-year deal that will keep him in the 250 Class for 2018 and 2019. 2018 - Mitchell switched teams to the 250 powerhouse, Star Racing Yamaha. Riding in the 250 West class, he showed speed but was hurt early and didn t get many chances to show it. He was top 5 in a deep field every race he started and finished. In a RacerX interview after the season, he gave all the details. I broke my collarbone in 2017 in San Diego, and kind of got some bad advice from some doctors, which set me back. I had a plate on my collarbone and it broke at the end of the plate so we moved the plate over. Then it broke at the beginning of the plate so we took the plate off and bone grafted it and tried to get it as strong as we could. Then last year in Phoenix I crashed during practice and broke it in two spots and didn t even know it. It was weird. All the pain I had was in my arm. All the trauma I ve had to that shoulder in the last couple years, I think I lost some feeling in my collarbone area. I tried racing Oakland because nothing was popping up that was wrong with my arm, then I found out my collarbone was broken in two spots. Now its plated end-to-end and I feel like we re in a good spot with the shoulder. I came back and raced Seattle, and after that I was riding outdoors and only had a lap-and-a-half left in the day when I tipped over in a corner, stuck my leg out wrong, and blew my ACL and MCL out. The injuries lead to a long recovery period. He was out for the entire Motocross season. 2019 - Mitchell returned to the Yamalube/ Star Racing Yamaha team, fully healed from all his injuries, but still coming off a long layoff from racing. He was consistently one of the fastest riders in qualifying, but poor starts held him back. His worse finish was fifth, but a series of crashes prevented him from qualifying in the East / West round in Atlanta, and then the same thing happened in Vegas. He still finished seventh in the championship, but could have been in the top 3 or 4 without those 2 DNQs. Oldenburg looked like a favorite for the win at Vegas, after finishing second in the previous round and riding strong in qualifying. Not only did that not happen, but after his crash in the LCQ, he ended up getting third degree burns on his upper leg and back. He was trapped under a bike with a red-hot exhaust system. The injury Mitchell sustained in the Supercross series kept him out of action until Round 4 of the 250 Motocross series. He often showed good speed, but unlike his teammates, other than 2 holeshots, his starts were not good, and he struggled to put it all together for a good result. He finished in the top 10 in only 4 motos, his best finish being a 9th at Unadilla. He ended the series in 17th. 2020 - Mitchell was released from the Yamalube/Star Racing Yamaha team at the end of 2019. He was able to find a ride with the Penrite Honda team, racing the Australian Supercross series in the 250 class. He won 2 races and finished a close third in the championship. The team decided to go racing in the US, and although he wasn t in their original plans, his strong results lead the team owner to include Mitchell in the team s maiden voyage in 250 West Supercross. Mitchell had a tough start on the new team, qualifying, but not able to get a good finish at A1. After that, he was consistently in the 6 8 range. Then he broke his collarbone in practice at San Diego, the last round before the break. With the break taking much longer than anyone could have foreseen, Mitchell was healed and able to race the last 3 rounds. His three solid races in SLC landed him 8th in the points, despite missing a round. He did not participate in the 2020 US Motocross series. 2021 - Mitchell returned to the team he rode with in 2020. There was a new title sponsor, so it was no longer known as Penrite Honda, but as Muc-Off Honda. The team continued to race the Supercross series only. Riding the 250 East Supercross series, he was in the 4 - 8 position every round he finished. He was lucky to survive a highlight reel crash at Round 3. His bike locked up while launching a triple, causing a severe endo. He took a hard hit to the ground, while his bike flipped off the track. He was sitting in sixth when the series took it s very long break. With teammate Justin Brayton injured, the team entered Oldenburg in the 450 class several times during the break. He qualified for four 450 Mains with his best finish a 13th in the deep field. Mitchell was injured while preparing for the last two rounds of 250 West series, and dropped to 9th in the series. 2022 - Oldenburg raced Supercross for the Smartop/Bullfrogs/MotoConcepts Honda team in 2022. He raced the 250 East rounds, and switched to a 450 when that region was on break. He competed in eight rounds in each series, missing only one 450 round with a family emergency. His 250 series got off to a rough start. He was standing behind the gate without his bike when his heat was about to start, never a good sign. Despite frantic efforts by the team, the bike would not start. They got it going for the LCQ, but with a terrible gate pick, he got caught up in LCQ chaos and DNQ. He was solid from that point on, in the top ten every round but the last one. His season best was a 3rd at St. Louis, his first podium since 2019. He finished fourth in the 250 East series even with the first round DNQ. Mitchell rode well in the 450 rounds, despite sometimes switching displacements from week to week. He qualified for the Main every round he competed in, with a season-high 9th at Seattle and Denver. Once again, Oldenburg did not race the Motocross series. When the World Supercross series (WSX) was announced, Mitchell was one of the first riders named to a team. He would race for Smartop/Bullfrogs/MotoConcepts Honda in the SX2 (250) class. The 250 class had a lot of veterans and riders coming out of semi-retirement, not the usual mix compared to a typical AMA 250 SX. Round 1 England - The format was two relatively short motos and then a longer Super Final. After a very close second to Justin Bogle in his heat, Oldenburg holeshot Moto 1. Bogle and Kyle Chisolm had issues giving Oldenburg a big lead with Chris Blose moving into an eventual second. Early in Moto 2, Oldenburg went down hard on the tricky switchbacks in the middle of the track. He went to triple to the inside and landed on Derek Kelley, flipping over the bars. He was credited with 19th. He had another holeshot and win in the Super Final. Even with the DNF, he was third overall in the GP . Round 2 Australia - Oldenburg had a few bad starts and ended up 7-4-6 for 5th overall. It looked like he was matching the speed of the leaders, but bad starts, and a run-in with another rider which left oil on his brakes in one moto, held him back. He was 5th in the SX2 Championship. 2023 - Racing again with the Smartop MotoConcepts Racing Honda team, Mitch had a consistent season in 250 West Supercross, never quite reaching the podium, but carding a fourth at Anaheim 1 and Anaheim 2. Despite missing the NJ round, he still finished fifth in the championship. Oldenburg sat out the Motocross championship, but showed up for the last round of the SMX playoffs. Qualifying through the 250 LCQ, his 13th overall (with triple points!) was enough to propel him into 18th place and some cash. Oldenburg once again was racing the in the (barely) expanded WSX series in the MX2 class. After a fourth overall in round one with a 20-7-2 score, the next few rounds were cancelled. During the long break before the last two rounds, they decided to put Mitchell on a 450. It would prove to be a great move. In the Dubai race, let's just call it what it was, an Arenacross track, Mitch showed good speed on the 450, getting close to the podium with a 4th in the second race. A DNF in the first race and a bad start in the third knocked him down to 11th. He had a breakout ride in Australia, leading laps, dicing with Ken Roczen, and finishing second overall. Since the title was decided at the last race, and in an obvious oversight, Oldenburg didn't get to participate in any podium festivities. They were making a big deal out of this "world" championship being decided. Despite only racing two of three rounds, he ended up 9th in the 450 class.Oldenburg didn't race a lot of races in 2023, but he made very efficient use of the races that he did participate in. A fifth in 250 SX, a top 20 in SMX, and a top 10 in WSX. 2024 - Mitchell started the year riding in the 250 West Supercross championship for Smartop MotoConcepts Racing Honda. The season got off to a slow start when he got stuck in the gate at the start of the Main, but he recovered well for 8th. After the first five rounds, he was sitting in sixth. While the West was on break, he rode a round of the 450s in Texas (not west enough?) putting in a solid 12th place. When the series moved back west to Seattle, he was on a 450 and would ride one for the rest of the series. He capped the year off with a 9th place at SLC, finishing 21st in the points despite only racing 6 of the 17 rounds. He was also 15th in the 250 SMX seeding. He did not race any Motocross rounds or any of the races in the three-race SMX playoff, but was in for the late-year WSX series. Riding a Rick Ware Racing Kawasaki, he finished 4th overall in the 450 class. Towards the end of the WSX series came the announcement that he would he compete in the upcoming 2025 Supercross season aboard a Beta Factory 450 RX. The team will also compete in three selected outdoor motocross events and the three SMX races at the end of the season.