CHICAGO (AP) — When Justin Steele got hurt on opening day, the big question for the Chicago Cubs centered on the state of their rotation without their ace left-hander.

That concern faded away over time.

Steele returned to one of baseball’s best rotations on Monday night, starting the opener of a three-game series against the San Diego Padres. He allowed three hits, struck out two and walked one in 4 2/3 scoreless innings.

It was Steele’s first major league appearance since he strained his left hamstring while making a play on a sacrifice bunt at Texas on March 28.

The 28-year-old Steele was a breakout performer last year, going 16-5 with a 3.06 ERA in 30 starts. He made the NL All-Star team for the first time and finished fifth in balloting for the NL Cy Young Award.

Steele made a rehab start with Triple-A Iowa on Wednesday, allowing three runs and six hits in 3 1/3 innings. He threw 68 pitches against San Diego, 43 for strikes.