Weiss said Belisle's continued work on his changeup and his years of service to the club give him confidence, even though Belisle's ERA last season spiked to 4.32 -- his highest since he became a regular bullpen member in 2010.
"I don't get too caught up in spring for guys that are established," Weiss said. "I think if it were a regular-season game he probably would have attacked it a little bit different."
Thomas Harding is a reporter for MLB.com. Follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.