CINCINNATI — The unbeaten Mets are hoping erratic left-hander Oliver Perez can shake off a rough spring when he makes his regular-season debut here this afternoon against the Reds. Perez, who also pitched for Team Mexico in the World Baseball Classic last month, was bounced around at times in Grapefruit League action. He ended his spring by giving up a grand slam to Boston’s Jed Lowrie at Citi Field last Saturday. Perez lasted just 2/3 of an inning in that start.

Perez is 9-4 with a 4.02 ERA lifetime against the Reds, and the nine wins mark Perez’s high against any team. He is 4-2 with a 3.91 ERA at Great American Ball Park.

Perez will face off against right-hander Bronson Arroyo, who is 4-1 with a 2.02 ERA in his past six starts against the Mets. Arroyo has been battling carpal tunnel syndrome this spring.

Here is the 2-0 Mets’ lineup for the 12:35 p.m. game:

Jose Reyes SS

Daniel Murphy LF

David Wright 3B

Carlos Delgado 1B

Carlos Beltran CF

Ryan Church RF

Ramon Castro C

Alex Cora 2B

Oliver Perez LHP

Perez’s numbers against the Reds’ hitters

The 0-2 Reds will counter with:

Willy Taveras CF

Darnell McDonald LF

Joey Votto 1B

Brandon Phillips 2B

Jay Bruce RF

Edwin Encarnacion 3B

Ryan Hanigan C

Paul Janish SS

Bronson Arroyo RHP

Arroyo’s numbers against the Mets’ hitters