Whether you're in need of an injury fill-in or just a hot-hand play, Scott White has you covered with 10 sleeper hitters for the upcoming scoring period, all rostered in less than 80 percent of CBS Sports leagues. They're not must-starts by any estimation, but they're the best you'll find off the waiver wire.

All information is up to date as of late Sunday. Sleeper hitters for Week 21 (Aug. 11-17)

Ivan Herrera DH STL St. Louis • #48 • Age: 25

Matchups COL3, NYY3

Rostered 77% Ivan Herrera's roster rate continues to lag even though he's a catcher-eligible player getting everyday at-bats elsewhere -- and a monster hitter to boot. That's especially true against left-handers, of which there are three on this week's schedule. He has a 1.280 OPS vs. lefties, with seven of his 1

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