The commissioner's office announced one drug-related suspension on Monday.
• Reds minor league lefthander Mitch Clarke received a 50-game suspension without pay following a second violation for a drug of abuse. Cincinnati signed Clarke out of high school in Kitchener, Ontario, in the 19th round of the 2009 draft. The 22-year-old made one appearance in the Rookie-level Arizona League this season on June 24, allowing a run on a hit in two innings.
The office announced a trio of 50-game suspensions on Sept. 10:
• Reds minor league second baseman/third baseman Niko Vasquez and righthander Jamie Walczak tested positive for an amphetamine. Both players finished the season with high Class A Bakersfield. The 23-year-old Vasquez, who signed with Cincinnati after being released by the Cardinals in May, batted .235/.323/.378 with four homers in 238 at-bats for the Blaze. Walczak, a 15th-round pick in 2009 from Mercyhurst (Pa.), logged 100 innings for Bakersfield (13 starts, 26 relief appearances) and posted a 5.65 ERA and 1.55 WHIP.
• Free agent righthander Frank Diaz tested positive for metabolites of Stanozolol and will begin serving his suspension if and when he signs with another major league organization. The Diamondbacks signed him on July 2 this year and released him on Sept. 7, though he never actually pitched for the organization.