PITTSBURGH -- Ranger Suárez is healthy, happy -- and dominating on the mound.

The Phillies left-hander has made three starts since spending a little over two weeks on the injured list with a back strain. He hasn’t given up an earned run in any of them.

Though he did not factor in the decision, Suárez was outstanding again Saturday night as the Phillies edged the Pirates 2-1 in 10 innings at PNC Park for their fourth win in a row.

He allowed just three hits in six shutout innings, while striking out eight and walking one.

“Typical Ranger,” Phillies interim manager Rob Thomson said. “He was getting soft contact, throwing the fastball for strikes, landing his breaking ball, pounding the ball in on right-handers. One inning they loaded the bases, but other than that, he was great.”

Suárez pitched five shutout innings against the Marlins in Miami on July 16 in his first start off the IL. He then allowed three unearned runs in five innings in a no-decision against the Braves at home on Monday.

Overall, Suárez is 7-5 with a 3.60 ERA in 18 starts this season.

“One of the biggest problems when you have an injury is not only does it hurt, but it’s in your head all the time,” Suárez said. “This is hurting, then you start wondering if it is hurting because of the back. Then something else is hurting, and you’re wondering if it’s related to another thing. It obviously takes something away from that level of focus I need to be in. You just feel much better about everything when you’re healthy.”

It also feels better when you are winning. Suárez is playing his part in the Phillies being in contention for their first postseason berth since 2011.

“It’s a blast to catch a guy like Ranger,” said Phillies catcher J.T. Realmuto, who hit a solo home run in the sixth inning. “He pounds the strike zone, and he can do so many different things, throw different pitches to different parts of the plate. He’s a lot of fun to catch because you can almost toy with hitters, mess with their heads because they don’t know what’s coming next.”

Suárez retired the first 11 Pirates batters before getting into a bases-loaded situation with two outs in the fourth in a scoreless game. He escaped by getting Diego Castillo to fly out.

After Realmuto put the Phillies on top 1-0, the Pirates had a runner on third with one out in the sixth, but Suárez also got through that unscathed.

“I think everything with Ranger is based on hitting the locations with his fastball,” Thomson said. “If he’s throwing strikes and hitting his spots, his stuff plays up. His velocity was up tonight. I saw a bunch of 93s. When he’s doing that, his secondary stuff plays up. He fields his position very well. He does a lot of little things within the game to help himself.”

The Phillies won in 10 innings for the second night in a row, scoring the go-ahead run on a throwing error by first baseman Michael Chavis.

Corey Knebel pitched two scoreless innings for the win.

Handed the lead, Knebel picked automatic runner Oneil Cruz off second base to start the bottom of the 10th. He then got rookies Bligh Madris and Cal Mitchell on grounders to end the game.

“We talked about it in the dugout before the inning started, and thought we might have a chance,” Realmuto said of the pickoff. “It was incredible. You don’t see that very often.”