Murray wrote on Twitter: "Moving forward, I am firmly and fully committing my life and time to becoming an National Football League quarterback".
"He's really fun to watch on a football field, and he's going to be fun to watch on a baseball field".
Kyler Murray will follow his heart, choosing to play pro football rather than baseball.
Venezuela seeks to double oil exports to India
Unilateral sanctions by the United States have reduced PDVSA's oil output and caused a loss of about $20 billion to its oil revenue-dependent economy, he said.
Oklahoma quarterback Kyler Murray speaks during an NCAA college football media day on Thursday, Dec. 27, 2018, in Miami Gardens, Fla.
Murray was given a $4.66m (£3.62m) signing-on bonus by the A's.
It is very possible - and more than likely at this point - that both Haskins and Murray come off the board before the end of the first round of this year's NFL Draft. That, too, is according to the league's design-one that artificially suppresses salaries for young players through the arbitration system and keeps them from unfettered free agency for half a decade (where the owners have now also made a decision to keep their checkbooks closed, too). Even if a team wants to trade up for a QB, they may not need to pay the freight needed to get to No. 1, instead targeting a lower pick in the top 5. This isn't the equivalent of Ken Griffey Jr. or Bryce Harper walking away from the game; Murray is hyper-talented but plenty raw-possibly a star, but not a phenom. Beyond that, Murray won't have to spend the next few years playing in largely empty minor league parks, nor will he spend the first two to three seasons of his career earning roughly the league minimum, as he'd have done as a pre-arbitration MLB player. He is expected to be an early draft pick in this year's NFL Draft.
But as Murray leaves baseball, it's worth wondering whether or not he represents some grander failing on the part of the sport: Is baseball a destination for the country's best and brightest athletes? He helped Oklahoma win a Big 12 title and reach the College Football Playoff while becoming the second consecutive Sooner to win the Heisman Trophy. Oakland will put him on the restricted list for the time being, though that move is purely a formality for now, given the emphatic nature of Murray's announcement.