The Chicago Cubs drafted him in the 31st round out of high school in 2012, but Bonnell elected to go to college instead of turning pro.
[2] Bonnell was again selected in the 2015 Major League Baseball draft, this time in the 36th round by the Tampa Bay Rays.
[10] He did not make the team out of spring and spent the year with the Triple-A Rochester Red Wings, logging a 4.29 ERA with 59 strikeouts in 65.0 innings pitched across 36 appearances.
[11] On April 20, 2022, Bonnell signed with the Tecolotes de los Dos Laredos of the Mexican League.
On March 15, 2024, Bonnell signed with the Lake Country DockHounds of the American Association of Professional Baseball.