The visiting Chiefs beat the host Fort Wayne Wizards, 10-4, but Sandberg wasn't around to see the finale.
The trouble may have started Saturday. The Chiefs staff, which includes pitching coach David Rosario, apparently wasn't happy with the calls by home plate umpire Bronson Martinez while Jose Ceda was pitching.
On Monday, Rosario felt Peoria starter Rafael Dolis was being squeezed, and voiced his opinion from the dugout in the bottom of the third inning. Martinez ejected Rosario while he was still in the dugout. Rosario then went onto the field to argue face-to-face with Martinez, and covered home plate with dirt.
After Rosario exited, Martinez approached Sandberg and the two exchanged a few words. Martinez quickly tossed Sandberg, the Hall of Famer's first ejection as a manager.
In his playing career, which spanned from 1981-94, and again from 1996-97, Sandberg was ejected twice. This is his first season as a manager.
The Chiefs snapped a 1-1 tie in the fifth against Fort Wayne starter Aaron Breit and reliever Wilton Lopez. Yusuf Carter led off with a solo homer that initially looked like a triple until the umpires got together and ruled the ball hit the netting for a homer. Jim Adduci singled and advanced to third on a one-out hit by Matt Camp. Dylan Johnston walked to load the bases, and Alfred Joseph hit a two-run single. Russ Canzler added a two-run double to go ahead, 6-1.
Dolis walked four and struck out five over 4 1/3 innings. Alex Maestri (2-0) picked up the win in relief, pitching 2 1/3 innings. He gave up one run on two hits.
Carrie Muskat is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.