Heisman Trophy winner Reggie Bush will announce Thursday whether he'll return to Southern California for his senior season or enter the NFL draft. He has kept a low profile since USC lost to Texas 41-38 for the national championship in the Rose Bowl game Jan. 4. Underclassmen have until Sunday to apply for the April 29-30 draft. Bush is to make his announcement in the morning on campus. He has been projected for months as the No. 1 overall pick, and it will be surprising if he returns to the Trojans. Texas quarterback Vince Young inserted himself into the mix Sunday, declaring for the draft four days after his amazing performance in the Rose Bowl. After winning his Heisman in 2004, USC's Matt Leinart decided to return to school for his final year of eligibility although he almost surely would have been one of the top players in the draft.