The rookie right-hander was recalled from Triple-A Toledo prior to Tuesday's game against the Twins. Detroit optioned reliever Duane Below to Toledo after Monday's 9-3 loss.
Putkonen said he feels more comfortable with the big league club after spending time with the Tigers earlier this season. He posted an 8.59 ERA over 7 1/3 innings in six games during his previous two stints with Detroit.
"It's good -- a little experience helps," he said. "I still don't want to ever think [about] it, I just want to go out and pitch.
"I kind of know some of the guys by now, so it's a little more comfortable."
The 26-year-old owns a 4.68 ERA with 44 strikeouts in 50 innings for Toledo this season. Tigers manager Jim Leyland described Putkonen as an innings eater, someone who can throw two or three innings at a time for Detroit if necessary.
"I just want to keep doing what I've been doing," Putkonen said. "I don't want to do anything different. I went down there [to Toledo] and worked on the location of my pitches and just got ready to pitch."