Found out more about this...should have updated myself.
The Waikiki Beach Boys have four catchers on their roster. Unless they are playing makeup games, teams only play five days a week in Hawaii (not six like the AFL). I doubt the Mariners were expecting Clement to play so little on the island but I bet they knew going into it that he wasn't going to be playing more than three times a week.
If he has played about half of the games, he has sure had a lot of pinch-hitting appearances. I know he hasn't started 1/2 the games.
Mike Pelfrey > Matt Garza