BUFFALO, N.Y. (AP) — Minor league baseball’s new speed-up rules have hit a glitch on opening day.

The center field clock in Buffalo stopped working after the second inning of the Triple-A Bisons’ opener against the Rochester Red Wings. The game was the first on the regular-season minor league schedule, and first to debut pace-of-play rules introduced this offseason.

Pitchers have 2 minutes and 25 seconds to begin their windup or come to set between innings. And they have 20 seconds to do so between pitches.

Each pitch is supposed to be timed by three clocks in the stadium — two behind home plate and one beyond center field.

The clocks worked through two innings before the center field clock went out to start the third. It came back on at the start of the fourth inning.

Bisons officials had no immediate comment on the problem.