Well, i myself has always said, if you need to bring more than 4 bowling balls to a league nite, you need help! lol I mean i myself normally only bring 2, because, i hate dragging along the 4 ball roller, and during the winter, its a paint to drag it through the snow. I mean i do have 4 bowling balls in 2 lockers at one house i bowl in, but thats to just get them outa the house.
Now at one of the houses i bowled at, the GM who was a PBA member (Sean Quinn) who kept his stuff in the proshop did go through a couple balls during the nite, 1 for the first game, 2 for second game when carry down would start to show and thats about it. He had other stuff he would use if it was new, or had a new drilling and stuff, but that was only cuz he was on Columbia's staff.
But to bring over 4 balls to a league nite is funny. Although i did remember a couple yrs back at the Michigan State Mens tournament, i did see a guy have a 4 ball roller, two ball bag on top of that, and two more bags on his shoulders, and i just laughed, lol.