Quick hits about the Chargers coming out of Sunday's loss to the Raiders and going toward this Sunday's game against the Ravens in Baltimore:

1) As flat as the Chargers may have looked Sunday, several of their offensive players put in another busy game.

2) The Chargers are asking a lot of a healthy, savvy quartet. Philip Rivers , for starters. He leads all quarterbacks with 532 snaps and 331 dropbacks. Each total projects to the second-most in the NFL over the last nine years by a quarterback.

It's a gigantic mental workload because Rivers manages the line of scrimmage more than most quarterbacks do. The physical demand of heavy snap totals shouldn't be overlooked, either. Rivers will turn 34 in December. He has started 151 consecutive games.

3) Right tackle Joe Barksdale leads the team and all NFL tackles with 542 snaps. Protecting Rivers well and blocking for the run with some success, Barksdale is setting himself up for a healthy raise this offseason. The 26-year-old can be a free agent after the season. His current pace projects to the most snaps by a tackle since the Patriots ' Nate Solder worked 1,252 snaps in 2012.

4) Keenan Allen , the NFL leader in receptions, is second to only the Houston Texans ' DeAndre Hopkins in playing time by a receiver. With 512 snaps played, Allen is on pace for 1,167 snaps this season. He played 971 snaps as a rookie (1,081 including the two playoff games) and 853 last season before a broken collarbone ended his year.

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At age 23, Allen should be able to build on his career work rates if necessary. He is in excellent shape, having reported to camp a few pounds lighter in anticipation of a big season. He came back from a hip pointer to play a season-high 91 snaps against Oakland. However, his workload argues against using him on punt returns, though the Chargers have only three net return yards this season.

5) At age 34, receiver Malcom Floyd is a surprising 10th in snaps among NFL receivers despite missing most of Game 4 with a concussion. A year after playing a career-high 960 snaps, Floyd is on pace for 967 plays. Coach Mike McCoy singled out Floyd's conditioning for praise last week.

Even so, the Chargers may want to find Floyd more rest. He may have had less juice against the Raiders after working 93 snaps seven days earlier at Green Bay. Over 51 snaps against Oakland, he had one catch in three targets. I though he slowed down a little late last season. Undrafted rookie Tyrell Williams, who is from the Floyd mold, may be worth a look at some point.