(John Glennon, The Tennessean)-- Some quick-hit observations from the first day of Titans training camp, Saturday at Saint Thomas Sports Park.

Lewan's first day: First-round draft pick Taylor Lewan, a tackle by trade, took some first-team reps at left guard because of Andy Levitre's appendectomy. Also getting first-team reps at left guard was Byron Stingily, who had been strictly a tackle prior to this past offseason.

Corner battle begins: Coty Sensabaugh got the first opportunity to start at the outside cornerback spot, in Alterraun Verner's old position. Blidi Wreh-Wilson will likely get the opportunity tomorrow, as the two go back and forth in the competition. Sensabaugh was beaten twice in a row during one seven-on-seven drill, as Kendall Wright and Justin Hunter both made nice catches.

Pollard says hello: Safety Bernard Pollard is generally known more for his hitting than his hands, but he picked off quarterback Jake Locker twice – once during a one-one drill and once during a team drill, when Locker sailed a pass intended for Delanie Walker.

McCluster shows vision: With Bishop Sankey still learning the system and Shonn Greene working his way back from knee surgery, Dexter McCluster will get plenty of reps at running back. He looked impressive on Saturday, breaking a couple of nice runs up the middle and then cutting to open space on the right sideline.

Good start for Mariani: Wide receiver Marc Mariani, who's missed the last two seasons with injuries, got off to a good start. He beat Tommie Campbell deep on one play, hauling in a perfectly placed Charlie Whitehurst pass in stride.