FOXBOROUGH, Mass. -- A Heisman Trophy, a riveting playoff game, an international following.

Tim Tebow won all that in his football career.

On Saturday, he lost his third NFL job in 18 months. It might be hard to find another.

The quarterback with two big problems -- throwing the ball and reading defenses -- was cut by the New England Patriots less than 12 weeks after they signed him and just five days before the season.

But, as Tebow sees it, this long journey is not over.

"I will remain in relentless pursuit of continuing my lifelong dream of being an NFL quarterback," he tweeted.

Coach Bill Belichick gave the player whose profile was higher than his production what may have been his last chance when he signed him June 11, the day the Patriots' three-day minicamp began. And Tebow is grateful.

He thanked Belichick, offensive coordinator Josh McDaniels and owner Robert Kraft, who said last Tuesday he was "rooting" for Tebow but would let Belichick make the decision.

In his tweet, Tebow thanked the "entire Patriots organization for giving me the opportunity to be a part of such a classy organization."

Belichick didn't comment on Tebow's release as one of the Patriots' moves to reduce their roster to the regular-season limit of 53 players by 6 p.m. EDT Saturday.

If anyone could turn him into a good NFL quarterback, it seemed, it would be Belichick. And McDaniels was a booster of Tebow, drafting him in the first round in 2010 as Denver's head coach. There even was speculation that Belichick might find other positions for the mobile Tebow to play, but he worked out only with the quarterbacks.

And his passes still bounced at receivers' feet and flew over their heads.

Now, barely two weeks after his 26th birthday, Tebow's NFL career may be over.

The Patriots have carried just two quarterbacks in three of the past four seasons. So with Ryan Mallett entrenched as the backup to Tom Brady, Tebow's challenge was a difficult one, even before the preseason started. Then he posted a quarterback rating of just 47.2 with two touchdown passes, two interceptions and seven sacks in three exhibition games.

Tebow's last play with the Patriots, and perhaps in the NFL, was a 9-yard touchdown to rookie free agent Quentin Sims with six seconds left in a 28-20 win over the New York Giants on Thursday night.

With two scoring passes, it was the best of Tebow's three games during a shaky preseason in which he completed 11 of 30 passes for 145 yards and ran 16 times for 91 yards.

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