Hollon, 20, was selected in the second round of the 2013 MLB Draft and is ranked as the club's No. 13 prospect by MLBPipeline.com. He was 1-1 with a 4.05 ERA in three games for Class A Lansing after spending the first part of the 2015 season with short-season Class A Vancouver.
Lansing wraps up its regular season on Sept. 7, which means Hollon's suspension will carry over into 2016. Hollon missed the entire 2014 season after Tommy John surgery and was the club's top overall pick in 2013 after the Blue Jays were unable to come to terms with first-rounder Phil Bickford.
Gregor Chisholm is a reporter for MLB.com. Read his blog, North of the Border, follow him on Twitter @gregorMLB and Facebook, and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.