Krueger received a wildcard into the 2012 US Open mixed doubles event, where he partnered fellow American Samantha Crawford, but lost in the first round.

[3] His first Grand Slam win was at the 2020 US Open where he defeated Pedro Sousa in the first round as a wildcard.

The following week at the 2022 Delray Beach Open, he reached the second round as a qualifier, defeating Jordan Thompson for his fourth ATP Tour-level win before losing to third seed Grigor Dimitrov.

192, he qualified for the main draw of the Citi DC Open in Washington and recorded his first ATP win in close to a year, since August 2023.

[8] Mitchell enters his second season with World TeamTennis in 2020, after making his debut with the Philadelphia Freedoms in 2019.