PORT ST. LUCIE, Fla. — The classic rock that boomed from the loudspeakers and washed over an otherwise empty field gave the moment the feel of a cinematic sports training montage.

With Creedence Clearwater Revival’s “Born on the Bayou” as the soundtrack, the Mets were all smiles, laughter and fist bumps as Johan Santana, the day’s protagonist, eased through a simulated game Saturday at Digital Domain Park. The scene required little dialogue or exposition.

The Mets will not announce their rotation until Sunday, but there were plenty of clear hints that Santana, who endured a training camp loaded with tension, was on the verge of being named the team’s starter for opening day Thursday at Citi Field against Atlanta.

“It’s great, man, it’s great,” Santana said. “I worked hard, and to be here right now and to be able to do everything the way it was supposed to be done — I didn’t miss one day — is huge for me.”