PHOENIX -- In the shadows of University of Phoenix Stadium, where he won a college football national championship with the Florida Gators in 2007, Tim Tebow's sternest baseball test yet got off to a quiet start. After fouling off a pair of full-count pitches from Washington Nationals prospect Austin Voth, Tebow grounded out to second base in his first Arizona Fall League at-bat. He went on to finish 0-for-3 with a pair of groundouts and a squibber in front of the plate as his Scottsdale Scorpions beat the Glendale Desert Dogs 9-6 before an announced crowd of 912 at Camelback Ranch on Tuesday. "Obviously I wish I could have done a little bit more at the plate and got a couple of hits," Tebow said after his AFL debut. "But it was fun. You've got to knock a little rust off. ... Each day is not just about the result. It's about: What are you learning? How are you improving? How are you going to be able to take that over into spring training?" On opening day in the league for...