They have changed quite a bit. I had mine out in '88 while in college. I had surgery on a Thursday night, was out of the hospital on Saturday AM (could have left on Friday night if I pushed it, but I had a cute nurse), and was back in class on Tuesday.
Now they do it laparoscopically, and it is much less invasive than in '88. I'm a little surprised he could play on Sunday, but given how minimal the laparocopic procedures are these days, I believe it.