Pitching in the major leagues for the first time since Sept. 5, 2002, Paniagua allowed four runs while recording only one out in Tuesday night's 8-6 win over Minnesota.
After being pulled in the ninth inning by Manager Jerry Manuel, Paniagua said something to plate umpire Mark Carlson on his way to the dugout and was ejected.
"He's a good guy, with a future ahead of him now that he's healthy," said General Manager Kenny Williams. "It's unfortunate it couldn't happen here, (but) that's not what we stand for. It's not where our focus lies. I could excuse the performance, but not the actions afterwards. The loss of composure at a crucial time or situation is just something we can't tolerate."
Paniagua gave up three hits and a walk, throwing six of 12 pitches for strikes. In seven seasons, he was 18-21 with four different teams.