DT Sen'Derrick Marks gets some work in Jaguars' final OTA session

Jaguars defensive tackle Sen'Derrick Marks takes a break during Friday's organized team activity session.The Jaguars were ready to wind down organized team activities on Friday, conducting the ninth and final voluntary practice.

However, defensive tackle Sen’Derrick Marks was just getting revved up. Marks made his OTAs debut on Friday, participating in individual drills and sporting a helmet for the first time this offseason. The 29-year-old veteran tore his triceps tendon in a 22-20 win at Baltimore on Nov. 15, ending his season.

“It felt good just getting back, trusting the process, going out and not having any hiccups,” Marks said. “For me, I think it’s all mental. I tell myself all the…