He's 6'1" and 180 pounds. He does need to get big.
If he doesn't already have visible abs at his current size, he's better off building muscle immediately.
To quote Mark Rippetoe, "Let's say you put on 40 or 50 pounds in six months. That's going to have a huge impact on how you look and how strong you are. But let's say you do the 'gotta keep my razor sharp abs' horseshit. You'll be lucky if you gain eight or nine pounds. What do you think is going to have more effect on how you look? 50 pounds, 30 of it muscle, or 8 pounds? No one gives a shit about your bullshit abs if you're 5'11 and 170 pounds."
How your friend hasn't yet been broken playing football, I'm not sure. Oh... wait... you probably meant soccer, right? Gotcha. That explains it. (I kid, I kid. I love soccer.)