The Buffalo Bills reached lucky number 13 of their 2018 training camp at St. John Fisher College in Pittsford on Sunday.

Here are three quick takeaways from Day 13 of Bills camp:

QB shake up

A lot of action happened for quarterbacks on Sunday and much of it appeared to benefit rookie Josh Allen. After AJ McCarron started the team’s last practice on Friday as the first-team QB, Nathan Peterman did so on Day 13.

However, Allen, who started with the threes, saw time with the starters for the second-straight practice after not doing so for four practices. There was a new wrinkle as well for Allen. Working with the ones for a few plays isn’t new, but Allen started to do so with the second-team offense for the first time in training camp.

Prior to Sunday, Allen only worked with the ones or threes.

Additionally, not that Allen will hope for these things, but both McCarron and Peterman took some bumps.

Worth noting: Buffalo head coach Sean McDermott did not name a starting QB for Friday’s second preseason game at Cleveland.

Coleman, Zay see more time

Wide receiver Corey Coleman, who was traded for last weekend, and wide receiver Zay Jones, who recently returned from injury, both saw a little more playing time, slowly but surely. The coaching staff is easing both back in.

Jones continues to wear a red non-contact injury, but is taking team reps with the starters. Of note, Coleman also saw time as a returner on special teams and worked with the starting offense for the first time.

Camp fight

Right tackle Jordan Mills was getting under some skin. Mills was jawing with defensive end Jerry Hughes and defensive tackle Kyle Williams during team drills.

It got heated.

Williams is a bit of a surprise participant, he even went the distance by throwing punching during the scrap.

Mills continued later in practice as well..

Up next: The Bills will have off on Monday and will return to training camp on Tuesday at 8:45 a.m.