FOXBORO -- Day 13 of Patriots camp was a damp, foggy session. Players had issues both holding onto the ball and holding onto the football in the conditions, which meant plenty of teaching point post-practice. 

Here's what we saw . . . 
 

Rex Burkhead, Matthew Slater, Sony Michel, Marcus Cannon and Harvey Langi were not present. Trey Flowers, Coradarrelle Patterson and Ryan Lewis headed to a lower field early. Kenny Britt (pictured) later joined them. Duke Dawson appeared to tweak his hamstring early in the practice, made his way to the blue tent and did not return to action. LaAdrian Waddle also left the practice briefly and was replaced by Isaiah Wynn at right tackle before returning.

-- Eric Decker (pictured) had a difficult time early in the practice securing the football. First, he committed a clear offensive pass-interference penalty on Patrick Chung. On his next rep, he dropped an easy catch. Later in the practice he dropped multiple throws sent his way during a side session -- no defense -- and showed his frustration by chucking a football and later punching his own helmet. Tom Brady tried to encourage him after the period. Decker cleaned things up later by catching a contested pass deep down the sideline with Jon Jones, among others, all over him. 

-- Chris Hogan (pictured) and Devin Lucien had up and down days in one-on-ones. Hogan couldn't get free from Eric Rowe on one rep, then snagged a pass off Stephon Gilmore's back on the next. On his final rep, he reeled one in one-handed and then had it punched out by JC Jackson. Lucien beat Jason McCourty and Keion Crossen for catches but dropped his third target. Lucien also dropped a Brian Hoyer pass in a hurry-up period at the end of practice. 

-- Receivers who showed up in one-on-ones were Phillip Dorsett (who had a nice grab with Gilmore on him), Julian Edelman (who beat Jones and Crossen), and Braxton Berrios (who beat Cyrus Jones on an out-route). 

-- Jason McCourty did pick off a Hoyer pass intended for Dorsett in one-on-ones. 

-- The one-on-ones for the big boys were kick-started by a win for Trent Brown over Adrian Clayborn. Other offensive linemen had some problems, though. Joe Thuney was beaten by Malcolm Brown late in one rep, Danny Shelton got by David Andrews, Adam Butler turned Ted Karras inside out, and Deatrich Wise handled Matt Tobin with a power move. Keionta Davis (on Wynn), Lawrence Guy (on Thuney) and Frank Herron (on Ulrick John) also had wins. 

-- James Ferentz (pictured) did have a solid rep against John Atkins, and Waddle and Derek Rivers both crumpled to the wet turf for a draw on their rep. 

-- Brady (pictured) went 15-for-28 in 11-on-11 work with a pick to Jackson, while Hoyer 11-for-18 with a pick to Gilmore. Danny Etling went 3-for-3 in his reps. 

-- Brady lost his cool after his final rep of the day. He threw one pass incomplete to James White along the sideline at the tail end of a hurry-up period. Knowing his group was done, Brady called for the ball -- which had bounced toward a staffer -- caught it, and punted it into the crowd. Brady had passes broken up by Chung and Geneo Grissom. He also threw deep down the field into triple coverage for Dorsett and was picked off by Jackson. He had one pass down the field dropped by Rob Gronkowski. His nicest completion of the day rewarded his insistence on throwing to Decker, who'd had drop issues earlier in the practice. Brady plopped one deep down the sideline to his new target with Jonathan Jones close in coverage. Highlight-reel pitch and catch. Decker caught three of his five targets from Brady in 11-on-11 (no drops), and he added one grab from Hoyer. 

-- Hoyer's numbers on the day were impacted in a big way by drops. He had one three-throw stretch where he had on-the-money passes dropped by Paul Turner, White and Will Tye. Lucien also dropped a Hoyer pass. Hoyer later had a rep blown up when Berrios (who had a nice diving grab earlier in the practice) ran an incorrect route. On the play when Gilmore picked off Hoyer, Riley McCarron appeared to be in an area where Hoyer wasn't expecting him. The two talked it over -- with McCarron doing most of the listening -- immediately after. 

-- Jason McCourty got a look as the team's No. 2 corner. He drew praise from Bill Belichick during Belichick's morning presser. 
 
-- Davis, who also earned plaudits from Belichick, was out there with the first-team defense at times. 
 
-- McCarron muffed a punt early in the practice. Edelman (pictured) returned punts later in the practice and was active as a receiver. On one rep in 11-on-11, Rowe fell on Edelman's legs and Edelman flexed his right leg several times. He remained in the practice, however.