Found this.
So what do the pros have in their wedges? Last weeks winner of the Bay Hill Classic played the same shafts in his irons and full complement of wedges. The winner and runner up in the 2016 Open Championship both played the exact same shafts in their wedges as they have in their irons. Even Lydia Ko plays the same UST Mamiya Recoil graphite shafts in her irons and wedges. Some tour players like to play softer flexes and heavier weights in their sand and lob wedges since these are more feel-oriented clubs. Steve Stricker favors that setup. Rory McIlroy favors a softer shaft, Project X 6.5 in his wedges versus the Project X 7.0’s in his irons.