Marcus Mariota will participate in passing drills at the 2015 NFL scouting combine, according to ESPN's Chris Mortensen. Mariota's participation was uncertain, in part because he was recovering from a sprained shoulder, but it appears he's given in to all the cries to take part in the least relevant part of an already overhyped event.
As soon as that news broke, Ian Rapoport reported that Jameis Winston will throw as well. Nice timing.
Winston he has fewer questions to answer about his passing, given that he has played in a pro-style scheme and consistently made pro-style throws. But it's not like Mariota can answer the questions about his transition to a pro-styule system without a pass rush, against wide receivers running free. At most he'll be able to show off some mechanical improvements and a comfort level with under-center-style dropbacks.
The quarterbacks' decisions to throw at the combine are actually pretty unusual: most top quarterbacks choose not to, because they really have nothing to show that they hadn't already shown in college. But hey, now we have some more drama at the combine.