Crowne Plaza Invitational at Colonial Invitational rookie John Peterson and his band of followers from alma mater Paschal High School had plenty to cheer about Thursday.Peterson shot a opening-round 64, capped by a 12-foot birdie on his final hole that placed him in a four-way tie for third place.“My caddie said, ‘Just make this one for everyone here,’” Peterson said. “There was no sense in lagging a 12-footer for birdie anyway. It was pretty cool when they went off like that.“They didn’t shut up quick enough. They were just loud for too long. That’s how my friends are.”Even Aaron Baddeley noticed the commotion from a nearby practice green.“Eagle?” Baddeley asked Peterson.“A birdie. I’m from here,” Peterson replied, slightly red-faced.Fellow Colonial rookie and Paschal graduate Franklin Corpening birdied his last two holes for a 68.Peterson, whose family used to be Colonial members, believes the 64 is a personal best for the course.“I had a couple of 65s back when I was in high school, but never a 64,” he added. “And those [65s] were from the gold tees.”Hogan winner primedMatt Every, the 2006 Ben Hogan Award winner, shot a bogey-free 65 Thursday. Every started his round at No. 10 and birdied Nos. 15, 16, 17, and 1.“I never really had a chance to make bogey today,” Every said. “I made a couple 10-footers in the middle of my round. It was pretty solid.”Can do betterFormer Mansfield High player Martin Flores holed out three chip shots for birdies, at Nos. 4, 8 and 14, to finish with a 66.Although the Dallas resident is tied for 13th and the 4-under round was his best in seven rounds at Colonial, Flores sees plenty of room for improvement, such as the missed 10-foot birdie on No. 18.“You know it wasn’t as crisp from tee to tee as I wanted it to be,” Flores said. “I struggled driving the ball today.”Last year’s leaderDefending champion Zach Johnson shot a 69 Thursday, his worst opening round since the same score in 2009. He was 2-under at the turn, but 1-over from there.“Overall more positive than negative, so I’m not going to dwell on too much,” Johnson said. “A fairly solid day. I didn’t shoot myself out of it, but I would have liked to have a couple more birdie putts.”The sandmanMatt Kuchar’s 65 included three birdies on holes 1, 2, and 12, where the tee shot landed in a fairway bunker.“I seemed to find a number of them on a lot of holes,” he said. “I hit great shots.”Perez departsPat Perez withdrew after playing seven holes in a morning round.“He said he’d hurt his neck last week at the Nelson,” playing partner Brendon de Jonge said.“He was in pain, you could see from the start. He tried to play through but you could see that he was hurting.” Correspondent Christian Clark contributed to this report.