Giants pitcher Luis Custodio and free agent pitcher Luis Sierra were suspended 56 games each following positive tests under the minor league drug program.
Pittsburgh infielder Rayber Romero, Colorado pitcher Stalyn Sanchez and Dodgers outfielder Geremias Valencia were suspended for 60 games each following positive tests under baseball's minor league drug program.
Cincinnati Reds pitcher Vladimir Gutierrez was one of four minor leaguers suspended Sunday for violating the Minor League Drug Prevention and Treatment Program.
Two minor league players in Single-A have been suspended after positive tests for banned substances.
While Madison Bumgarner had consistent velocity in Friday night's rehab start, the results were less than stellar as he gave up four runs and seven hits over 3 2/3 innings.
Former Braves All-Star pitcher Jair Jurrjens has been suspended 80 games under baseball's minor league drug program after a positive drug test in the minor leagues.
