Bullpen carts coming back

The Arizona Diamondbacks weren’t around when bullpen carts stopped being used by MLB teams, but they will be the first MLB team to bring back the staple of 1970s baseball. The Diamondbacks announced Tuesday that they will use a cart to bring relief pitchers from both teams in from the bullpen. OnTrac is sponsoring the Diamondbacks bullpen cart. Besides the novelty, the return of carts could speed up the game.