Well, one of the linemen from the Tennesse Titans did Sunday night ... and it was all to help the Nashville Predators win their playoff game.

Taylor Lewan and a bunch of his fellow linemen (along with QB Marcus Mariota) -- were sitting in a VIP section at the game when Taylor busted out the fish and chugged away.

Lewan's teammate, Quinton Spain, ripped off his shirt for moral support.

Of course, catfish is a "thing" with Preds fans -- they always chuck one onto the ice before or during a game. Lewan decided to up the ante.

The plan worked ... the Preds won the game 5-4 over the Winnipeg Jets.