"Now it's just a matter of getting pitching strength and getting that experience back, and getting out there and throwing every day," Nathan said. "That was my first time throwing back-to-back [days since the surgery]. The more times you get out there and do that, I think the better it's going to get."
Nathan was activated from the 15-day disabled list after Thursday's game, as right-hander Jim Hoey was optioned to Triple-A Rochester.
In three rehab games for the Red Wings, Nathan allowed one unearned run on two hits while striking out five and walking one in three innings. Before going on the DL, Nathan went 1-1 with a 7.63 ERA, allowed 13 earned runs in 17 appearances for the Twins.
"The biggest difference has been the confidence to get back out there and feel fine," Nathan said. "Confidence, I think, came with the way it felt after the scar tissue started breaking up. I think my arm speed has been a lot better.
"I've always talked about finishing pitches, and I felt like I wasn't finishing too well early on. When I threw in Rochester, it just felt like I was able to get out in front more and finish a lot more pitches. Even ones that I missed, a lot of times they were down."