Tim Tebow thinks his NFL career ended prematurely ... 'cause the ex-Heisman Trophy winner says when he watches football now, he still thinks, "I can totally do that!"
Speaking about how hard it was to give up his pigskin career on the "Journeys of Faith with Paula Faris" podcast ... Tebow said it's STILL difficult to swallow, 'cause he thinks he can still ball.
"It's still hard sometimes when I watch games and I'm thinking, 'I can totally do that.' Or, 'I can be doing this or playing here or crushing that!