Texas A&M righthander Barret Loux, the No. 6 overall pick by the Diamondbacks in the 2010 draft, has failed a team physical, reports Baseball America correspondent Jack Magruder of FOXSportsArizona.com.

Sources with knowledge of the situation told Magruder that the physical revealed a shoulder issue. Another source mentioned fraying in Loux' labrum. Jerry DiPoto, Arizona's interim general manager, declined to comment until negotiations with Loux are finalized.

Loux' sophomore season in 2009 was cut short when he came down with bone chips that needed to be removed from his elbow. He also missed two months of his high school senior season with shoulder tenderness.

Loux rebounded to dominate college hitters this spring with a 90-92 mph fastball that touched 95, going 11-2, 2.83 with 136 strikeouts in 105 innings. BA rated him as a sandwich-round talent, but the Diamondbacks are believed to have drafted him sixth overall in part because they didn't want to exceed MLB's bonus recommendation for their slot, estimated at $2.34 million.

Loux wouldn't be the first first-rounder to sign with a team after failing a physical. Pitchers Pete Janicki ($90,000 from the Angels as the No. 8 pick in 1992), R.A. Dickey ($75,000 from the Rangers as the No. 18 selection in 1996), Billy Traber ($400,000 from the Mets as the No. 16 choice in 2000) and Tim Stauffer ($750,000 from the Padres as the No. 4 selection in 2003) all signed for reduced bonuses.