Arkansas is home to two 1,000-yard running backs -- Alex Collins and Jonathan Williams -- and one of them is a little lighter as training camp opens in Fayetteville.

Collins, who rushed for 1,100 yards and 12 touchdowns last season, entered training camp at 215 pounds, nine pounds lighter than he was in spring football and more than 10 pounds lighter than he was much of the 2014 season, the Arkansas Democrat-Gazette reports.

"His endurance is so much better than it was a year ago," quarterback Brandon Allen said of Collins. "He's in there every play now."