Louis Oosthuizen, the No. 8 player in the world golf rankings and top-rated player on the commitment list for this week’s Crowne Plaza Invitational at Colonial, withdrew Monday because of a neck injury sustained while competing at last week’s HP Byron Nelson Championship.He has been replaced in the Colonial field by Stuart Appleby. D.A. Points also withdrew Monday and has been replaced by D.J. Trahan.Oosthuizen, the 2010 British Open champion, withdrew from the Nelson before Sunday’s final round despite being in 32nd place after 54 holes. But Oosthuizen, who slipped from seventh to eighth in the updated rankings, did not officially withdraw from Colonial until Monday.Ooshuizen’s departure means the field will not feature any of the world’s top 10 golfers. The highest-ranked competitor will be No. 13 Matt Kuchar.Charl Schwartzel, the 2011 Masters champion who will be making his Colonial debut, climbed two spots to No. 15 after finishing third at the Nelson.Rounding out Colonial’s list of top-30 players are Jason Dufner (No. 20), Hunter Mahan (No. 21), Bo Van Pelt (No. 26), Jim Furyk (No. 27), defending champ Zach Johnson (No. 29) and Rickie Fowler (No. 30).Returning champDavid Frost paused from his pro-am round Monday to snap a cellphone picture of the Colonial Wall of Champions behind the first tee box.Halfway up the right side of the wall that commemorates every tournament winner is the reminder of his crazy weekend of golf in 1997, ending with Frost donning the famous plaid jacket.“I didn’t play very well and ended up winning the tournament,” Frost said.But Frost, who posted a final-round 67, played well enough to beat out then rookie Tiger Woods and the first Colonial sellout crowd he brought with him.After sinking a long putt on No. 17, Frost, then a Dallas resident, remembers the nervous wait he shared with his then 9-year-old son Sean in the clubhouse as Woods and Texan David Ogrin finished their rounds. It was a much less frantic wait for Sean, who Frost remembers ran from green to green to watch his dad complete his 10th PGA Tour victory.Frost returns this week for his 26th Colonial appearance, this time with Sean, now 25 and a pro golfer, at his side as his caddie. Frost is in the midst of his best season on the Champions Tour, sitting No. 2 in points for the Charles Schwab Cup, and hopes he can relive the ’97 excitement again with his son.“Nothing you can control, but just play your game and hopefully Sunday I’ll be within a shot,” he said.For the kidsThe Crowne Plaza Invitational at Colonial hosted a free Nike Golf Youth Clinic on Monday at the driving range.The clinic, which has been conducted for more than three decades, included tips from PGA Tour golfer Jhonattan Vegas, a meet and greet with Disney TV personality Spencer Boldman and a dance contest between various mascots. Nike gave away 500 hats and 500 sleeves of golf balls, and the first 500 kids received sacks stuffed full of prizes. Jarret Johnson contributed to this report.