The first four Buffalo Bills training camp practices of the 2015 season are in the books, meaning that, believe it or not, we're effectively a quarter of the way through the team's summer practice schedule.

Practice No. 5 took place this morning at St. John Fisher, and now that it has wrapped up, let's run through the biggest headlines of the day. (We'll come back a bit later on with a more fleshed-out look at the day's proceedings.)

Read-option coming

On the other half of the field, it was all EJ Manuel and the read option. — Tyler Dunne (@TyDunne) August 5, 2015

Safety rotation

Bills 2nd team defense today: 50-67-56-54-90-33-30-59-36-29-39 That's Meeks/Rambo at safety. No Duke Williams. — Sal Capaccio (@SalSports) August 5, 2015

In 11-11 Duke Williams is with 2nd team D. Wasn't earlier. Working with Meeks at safety. — Sal Capaccio (@SalSports) August 5, 2015

Kouandjio, Wynn dinged

Rex Ryan says Jarius Wynn and Cyrus Kouandjio both left practice with knee injuries. Doesn't expect either to be serious. — Tyler Dunne (@TyDunne) August 5, 2015

A break for the offense

1st O going against 2nd D and vice-versa. — Sal Capaccio (@SalSports) August 5, 2015

Not rest for Shady

Fred Jackson and Bryce Brown getting 1st team reps today. Could be another rest day for McCoy. — Mike Rodak (@mikerodak) August 5, 2015

#Bills HC Rex Ryan: LeSean McCoy has a toe injury. I think and I hope he'll be ready to go for the scrimmage — Joe Buscaglia (@JoeBuscaglia) August 5, 2015

Mario is good

Mario Williams shucking away linemen... https://t.co/iGu8hvDMKU — Tyler Dunne (@TyDunne) August 5, 2015

Leo's new ride

Look how much happier he is!

Jimbo.

Jim Kelly and Andre Reed both taking in WR drills this morning pic.twitter.com/SD1ucG6KmA — Mike Rodak (@mikerodak) August 5, 2015

Camp schedule