Another semester of PGA Tour Q-School school is in the books, the final six-day, 108-hole examination having concluded Monday at Orange County National in Orlando, Fla., in usual nail-biting fashion.

Twenty-one of the 28 players that earned 2011 PGA Tour cards trusted Titleist golf balls for their success, including 16 Titleist Brand Ambassadors and golf ball loyalists. Pro V1x loyalist Billy Mayfair earned medalist honors, with Titleist Brand Ambassadors Ben Martin (T-2), Cameron Tringale (4th) and Jarrod Lyle (5th) not far behind.

Of the 162 players at the final stage, 113 played a Titleist golf ball, more than six times the nearest competitor with 17. Titleist was also No. 1 in Iron Sets (59), Putters (64) and Sand, Lob and Approach Wedges (164).

Of course, some players earned their diplomas more dramatically than others.

“I’m proud of the way I competed on the last 10 holes today,” Stanley, who finished tied for ninth, told The News Tribune. “It’s nice when you know what you have to do, and go out under extreme pressure and do it.”

Titleist Brand Ambassador Scott Stallings missed out on his PGA Tour card last year by one stroke, barely missing an 8-footer for birdie on the final hole. This time around, Stallings birdied his final two holes to finish three shots clear of the cutline (T-11), dropping in an 18-foot birdie putt on No. 18 for good measure.

Titleist Brand Ambassador Jim Renner made par on the 18th to secure his card, but it probably felt more like an eagle.

After hitting his drive into the rough left of the fairway, with trees blocking his direct line to the flagstick, Renner hit a sweeping hook to 15 feet and two-putted for par to finish tied for 22nd.

Here's a closer look at the Titleist equipment used by the Titleist Brand Ambassadors and golf ball loyalists in earning their 2011 PGA Tour card (listed by finish at Q-School):