Tim Lincecum’s latest comeback attempt got off to a rocky start Monday.

Lincecum, a two-time Cy Young Award winner, allowed two runs in his lone inning during a rehab start for the Round Rock Express, the Texas Rangers’ Triple-A affiliate.

Facing the visiting Iowa Cubs, Lincecum yielded a walk, a double and a run-scoring wild pitch. He struck out the last two batters he faced.

“It was pretty nerve-wracking,” Lincecum said, according to MLB.com. “The first three batters or so, my nerves were gone and my legs were shaking a little bit. But I shook it off after that.”

The 33-year-old right-hander hadn’t pitched a pro game since 2016, when he was 2-6 with a 9.16 ERA in nine starts for the Los Angeles Angels before finishing the year in Triple-A.

After sitting out all of last season, Lincecum trained extensively, then signed a major league contract with the Rangers in early March. Texas placed him on the disabled list due to a blister on his right middle finger, and he didn’t see game action until Monday.

“Physically, I feel fine,” Lincecum said. “It was more the nerves than anything. I was just trying to calm myself down, get my heart rate down. I’ve been there a thousand times, and this was no different. Just being off for a while let those nerves there.”

The Rangers view Lincecum as a relief pitcher, a departure from his role for nine years with the San Francisco Giants and one year with the Angels. Only eight of his 278 career regular-season appearances came in relief, though six of his 13 postseason outings came out of the bullpen.

A four-time All-Star, Lincecum has a career 110-89 record with a 3.74 ERA. He won the National League Cy Young Award in 2008 (18-5, 2.62 ERA, league-high 265 strikeouts) and 2009 (15-7, 2.48 ERA, league-high 261 strikeouts).