It all depends on if he slid or not...
Rule 10.06 (c):
http://www.mlb.com/mlb/downloads/y2007/10_the_official_scorer.pdf
When the batter attempts to make a two-base hit or a three-base hit by sliding, he must hold the last base to which he advances. If a batter-runner overslides and is tagged out before getting back to the base safely, he shall be credited with only as many bases as he attained safely. If a batter-runner overslides second base and is tagged out, the official scorer shall credited him with a one-base hit; if the batterrunner overslides third base and is tagged out, the official scorer shall credit him with a two-base hit.
Rule 10.06(c) Comment: If the batter-runner overruns second or third base and is tagged out trying to return, the official scorer shall credit the batter-runner with the last base he touched. If a batterrunner runs past second base after reaching that base on his feet, attempts to return and is tagged out, the official scorer shall credit the batter with a two-base hit. If a batter-runner runs past third base after reaching that base on his feet, attempts to return and is tagged out, the official scorer shall credit the batter with a three-base hit.