Timothy Donald Locastro is an American professional baseball outfielder in the San Diego Padres organization. He has previously played in Major League Baseball (MLB) for the Los Angeles Dodgers, Arizona Diamondbacks, New York Yankees, and New York Mets. He holds the MLB record for most consecutive successful stolen bases to start a career, with 29.

In baseball, a stolen base occurs when a runner advances to a base unaided by other actions and the official scorer rules that the advance should be credited to the action of the runner. The umpires determine whether the runner is safe or out at the next base, but the official scorer rules on the question of credit or blame for the advance under Rule 10 of the MLB's Official Rules.