He has previously played in Major League Baseball (MLB) for the San Francisco Giants, Cincinnati Reds, and Seattle Mariners.

In 2012 he won the Colonial Athletic Association (CAA) Rookie of the Year award, and was an All-CAA Third Team selection at second base.

Vosler made his professional debut that year with the Boise Hawks, batting .266/.361/.372 with one home run and 11 RBIs in 30 games.

Vosler played for the South Bend Cubs and Myrtle Beach Pelicans in 2015 where hit a combined .238/.323/.374 with ten home runs and 40 RBIs in 107 games.

In 2016 he played for Myrtle Beach and the Cubs Double-A affiliate, the Tennessee Smokies where he slashed .254/.323/.359 with three home runs and 51 RBIs in 119 games.

[6] On November 20, 2018, the Cubs traded Vosler to the San Diego Padres in exchange for pitcher Rowan Wick.

Vosler did not play in a game in 2020 due to the cancellation of the Minor League Baseball season because of the COVID-19 pandemic.

[16] He made his MLB debut that day against the Miami Marlins as a pinch hitter for Kevin Gausman, popping out against Dylan Floro in his only at bat.

On April 25, Vosler recorded his first MLB hit, a single off of Marlins pitcher Richard Bleier.

On May 26, Vosler hit his first major league home run, a go-ahead solo homer off Alex Young of the Arizona Diamondbacks.

[19] On November 15, 2022 Vosler was designated for assignment by the Giants after they protected multiple prospects from the Rule 5 draft.