The sight of rookie running back Bishop Sankey running laps around the Titans' practice field has become too common for the team's liking at training camp. Sankey, a second-round pick, runs a lap every time he fumbles during practice. The problem reared itself against the Saints, when Sankey mishandled a fourth-quarter handoff from Zach Mettenberger, resulting in a turnover at the Titans' 30. Sankey is the team's leading ballcarrier through two preseason games with 19 carries for 68 yards, and he's added three catches for 47 yards. But Sankey won't be getting on the field too often if he can't be trusted to hold onto the football.