DETROIT -- On the day J.J. Putz returned from the disabled list, not all news was good for the White Sox's bullpen.
Bobby Jenks is dealing with forearm tightness that will keep him out of action for at least a few games and possibly more. Jenks, who had back issues at the start of the second half, first felt forearm discomfort early in the series against the Tigers and it hasn't gotten much better.
"Well, there's something going on," pitching coach Don Cooper said. "We are not sure what it is. He tried to throw last night and didn't feel too good."
Jenks had a heavy workload of late. He pitched three innings in an Aug. 22 game at Kansas City and 1 2/3 innings Aug. 29 against the Yankees. He then saved both games of Saturday's doubleheader at Boston.
"I can't say we overused him, he wanted to be out there for the team," manager Ozzie Guillen said. "Hopefully the tightness goes away in the next couple of days. That's all I know about it."
Putz had been sidelined since Aug. 25 with tendinitis in his right knee. He is 6-5 with a 2.88 ERA in 50 games this season. He will help the bullpen fill the Jenks void.
Guillen did not say who would close in Jenks' absence.
Doug Padilla covers the White Sox for ESPNChicago.com and ESPN 1000.