Marks set the Pac-12 record for most career receptions in his senior year, also finishing second in conference history with 37 touchdown catches and seventh with 3,453 receiving yards. While not the biggest receiver at six feet, 190 pounds, Marks may be the hardest-working. He had the pedigree coming to Pullman, a four-star recruit and All-Area pick in the Los Angeles area as a high schooler. Marks played in every game as a true freshman, starting seven (49-560, two TDs). He started the first nine games of the 2013 season, playing in all 13 contests (74-807, seven TDs). His contributions dwindled at the end of the year, however, and he had a couple of run-ins with local police. Head coach Mike Leach decided to redshirt Marks for the 2014 season to install some maturity. Apparently the break worked, as Marks was a first-team All-Pac-12 selection as a junior, starting every game and catching 104 passes (ranked fifth in the FBS) for 1,192 yards and 15 scores (fourth in the FBS). He repeated the first-team all-conference honor in 2016, though his numbers were down slightly (89-894, 13 TDs).
Gets into routes with good forward lean and decent acceleration. Creates movement in defenders with his routes and leverages himself into open throwing windows. Shows very good body control when ball is in the air. Works aggressively back to the throw and scrambles with his quarterback to open up. Natural hands catch most everything. Plucks it with good extension. Excellent footwork near the boundary. Has short-area foot quickness to create separation as well as elude tacklers in tight quarters. Has some suddenness in and out of his breaks.
Can be physically dominated by size. At times will struggle to find a quality release against press. Lacks route strength and can be too easily re-routed. Below average vertical push into his routes and top speed is non-threatening. Production totals bolstered by volume of targets and short passing game. Loses some focus when ball leads him into traffic. Plays finesse football and plays small. Needs to get better at stacking cornerbacks once he gets the jump on them. Has unusual ball security issues after the catch.
Possession receiver with below average speed, but adequate quickness and separation ability underneath. Marks has worked outside and from the slot and he blocks enough to be considered by teams who like to run out of three-wideout sets. Marks' best fit might be in the slot and his draft slotting will be heavily influenced by his 40 time.