Center with a durability of 13 (yellow, so not much improvement expected) - is it worth the risk for good player otherwise?

If it were me, I wouldn't hesitate to try to recruit him. Especially if no one is going to challenge you for him. I've had players with low durability in the past and they don't seem to get injured any more than any other player. Four seasons ago, I recruited a player at 26 and yellow and he went on to have a stellar career and never got injured.

But having said that, I wouldn't want all my guys to be that low, but I'll risk it on one or two.

durability is meaningless. durability is just how long it takes a player to recover from injury not how likely they are to get injured and injuries are pretty rare. so never bother looking at dur as a stat

Is that set in stone Ropey? The only players I've ever seen miss a game due to injury were my guy with ~13 Dur who missed a chunk of games one year and my brother's starting forward with like 2 Dur who missed his tournament game (!)

But even if it slightly ups susceptibility it is still a nonfactor when deciding whether to recruit

DUR does affect the time it takes to recover, but it also plays with the Health rating after an injury occurs.

A guy with a 90 DUR rating may only dip to a 70 Health if he suffers an injury. I'm pretty sure that same injury for a guy with a 20 DUR, will dip to a lower starting point. I'm pretty sure I've never seen a 90 DUR dip to 20 Health.
But similar injuries are not the same. I had a couple ACL a few weeks apart.
My guy with a 37 DUR dropped to Health of 26. Health, improving only 4 points per practice, that took 9 practices to reach a 60 Health, and 19 practices to get back to 100. With the no ratings gains while health is under 60, and limited until 100, his total rating changed 0 points for the year. Started 734. Ended 734.
Another player with an ACL had DUR of 21. He dropped to 46. Improving again at the slow 4 points per day, he was up to 60 Health in 4 practices. To 100 by 14 practices.

My suggestion has always been make the DUR a bit more important. Even have more injuries, but with quicker recovery for most. But all injuries have the same seriousness. Doesn't matter ACL or twisted ankle.
Have the injured guy's Health fall to the DUR rating after an injury. Then improve by that amount every practice.

If DUR is 30, if injured his health falls to 30. Means he won't play the next game. The next day Health is up to 60, probably still not playing. But up to 90 after two off days. 100 after three days.
If DUR was 80, an injury drops the health to 80. Meaning he could probably play immediately. After one off day that Health is back to 100.

Yes it is worth the risk, I ignore it in ALL cases.

I ignore Durability as well.

Durability is a rating??

I personally ignore durability, FT shooting, and rebounding.