Former Quad Cities River Bandits reliever Michael Dimock was suspended for 50 games Monday after testing positive a second time for a drug of abuse. The San Diego Padres minor-leaguer will begin his suspension at the start of the 2016 season.

Dimock split the 2015 season between San Diego’s Double-A and Triple-A affiliates. Overall he went 3-0 with a 2.10 ERA, four saves, 70 strikeouts and six walks in 60 innings.

He was drafted by the Houston Astros in 2012 and made 10 relief appearances for the River Bandits the following year. He went 5-0 with a 3.09 ERA, 15 strikeouts and two walks in 11.2 innings. He was traded to the Padres in June 2014.

First baseman Austin Byler, an Arizona Diamondbacks farmhand who played rookie ball this year, also was suspended 50 games Monday. He tested positive for an amphetamine.

Major League Baseball has issued 90 suspensions to 88 players this year for violations of the Minor League Drug Prevention and Treatment Program.