PITTSBURGH — Neil Walker’s homecoming will have to wait one more day.

The scheduled game between the New York Mets and Pittsburgh Pirates was postponed by rain Monday night and will be made up as part of a single-admission doubleheader today beginning at 4:05 p.m.

Walker, a Pine-Richland graduate, is returning as a visiting player for the first time since the Pirates traded him to the Mets for left-hander Jon Niese last December.

Niese (5-2, 4.36 ERA) and New York rookie Steven Matz (7-1, 2.60) were both pushed back a day to start the opener of the doubleheader. Jacob deGrom will pitch the second game for the Mets against Pirates lefty Francisco Liriano.

Walker was the Pirates’ first-round draft pick in 2004, made his major league debut in 2009 and was their second baseman the past six seasons.

The switch-hitter spent the day at the home he and his wife, who is seven months pregnant with the couple’s first child, recently had built in Pittsburgh’s northern suburbs. Pirates pitcher Gerrit Cole chauffeured Walker to the ballpark.

“I had only been in the visitors’ clubhouse once before and I had to rely on Kevin Conrad to show me around,” Walker said, referring to the visiting clubhouse manager at PNC Park. “There was definitely a little emotion there when we walked through the entrance in right field and I made a left turn toward the visitors’ dugout rather than walking straight to the home dugout.

“From the time I started playing tee ball until the end of last season, I’ve spent my whole life playing baseball in Pittsburgh.”

Walker leads NL second basemen with 13 home runs and has a .279 batting average through 53 games.