Kenton Locke St. John (born January 31, 1993) is an American professional baseball relief pitcher who is a free agent.

He has previously played in Major League Baseball (MLB) for the Texas Rangers and Chicago Cubs.

[4] On December 14, 2017, St. John was selected by the Texas Rangers in the minor league phase of the Rule 5 draft.

[7][4] He opened the 2019 season back with Frisco,[8] and on June 6 he was promoted to the Nashville Sounds of the Triple–A Pacific Coast League.

The team opened up a spot on the 40-man roster for St. John when Jacob deGrom was transferred to the 60-day IL.

[20] He spent the remainder of the season with Syracuse, struggling to a 2-5 record and 6.00 ERA with 25 strikeouts in 42.0 innings pitched across 29 appearances.