On July 26, 2012 — Not to be outdone, Pittsburgh’s Starling Marte homers on the first pitch of the game in his big league debut (only the third Pirate ever to do so), going yard against Houston’s Dallas Keuchel. Pittsburgh goes on to a 5 – 3 win as A.J. Burnett improves to 12-3. Marte adds another hit before the night is through.

Source:
Baseball Reference July 26