Jeff McNeil (hamstring) joined the Mets’ Triple-A Syracuse team at Lehigh Valley on Thursday for a rehab assignment, though it was short-lived because of the weather. The All-Star was set to play five to seven innings in the corner-outfield spots, but had to settle for one at-bat — he got hit by a pitch, stole second and scored — before the game was suspended by rain. He is eligible to come off the injured list Saturday.

“We want to see him ranging and running down balls, just to make sure he’s totally healthy,” Mickey Callaway said Wednesday before the Mets’ 2-0, rain-shortened win over the Indians at Citi Field. “We’re not really worried about the at-bats.”

Robinson Cano took another step in the right direction Thursday. Less than three weeks after tearing his left hamstring, he ran in the outfield before taking batting practice with the team and fielding ground balls at second base.

“He’ll just continue that progression,” Callaway said.

Brandon Nimmo (neck) played just four innings in the field Wednesday in his rehab stint with Triple-A Syracuse, but Callaway said that was the plan. He was out of the lineup Thursday.

“We’re trying to make sure he gets as many at-bats as possible in as few innings and continues his progression,” Callaway said.

Jed Lowrie continued his rehab assignment with Single-A St. Lucie as the DH, going 1-for-4 with a double.

The Mets designated infielder Ruben Tejada for assignment and called up pitcher Chris Flexen from Syracuse after the bullpen had to pitch six innings Wednesday.

“Hopefully, for our sake, [Tejada] will stay in the organization and be an option in the future,” Callaway said.

Because of the rain delays, fans who had tickets to Thursday’s game can exchange them for a ticket to any remaining home game Monday through Thursday through Sept. 26, subject to availability.