MLB appoints 1st black umpire crew chief – Sun Sentinel
How are umpires expected to call an extremely odd outcome to a play occurring during a baseball game that isn't covered in the rule book? - Quora
MLB Hall of Fame committees open induction doors for nonplayers - Los Angeles Times
Gary Cederstrom appointed crew chief for 2015 World Series
MLB umpire job responsibilities
Checking up on Berkshire County's MLB umpire Chris Conroy, Local Sports
AP: MLB appoints 1st black umpire crew chief
MLB Umpire: Kerwin Danley becomes the first black crew chief
Out umpire nearing 4,000th game
Umpire Angel Hernandez loses racial discrimination lawsuit against MLB
MLB appoints 1st black umpire crew chief
MLB appoints first black and Latino-born umpire crew chiefs
MLB appoints first black and Latino-born umpire crew chiefs