The seeding and tour validation process for the new Prototype Titleist AP1, AP2, CB and MB (712 series) irons is officially underway at Aronimink Golf Club outside Philadelphia.

On Monday, several Titleist Brand Ambassadors were welcomed on the range with a box of the new irons, custom built to their specifications, including: Rickie Fowler, Greg Chalmers, Graham DeLaet, Troy Matteson, Matt Jones and Jimmy Walker.

Titleist Brand Ambassadors Scott Stallings (AP2) and Bobby Gates (MB) got to Aronimink early Sunday afternoon and had already gotten 36 holes in playing the new prototypes.

Late Monday afternoon, Titleist Brand Ambassador Geoff Ogilvy stopped by the Titleist Tour Van to check out his new Prototype MB irons. Geoff didn't head to the range, given that he was wearing a T-shirt and cargo shorts, but said he was excited to hit them Tuesday. As were many other players planning on a Tuesday arrival in Philly.

Check out the slideshow below for pictures from Monday's testing, and stay tuned for more pictures and updates from Aronimink throughout the week.