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Rajai Davis, OF, Toronto Blue Jays (4.5 Percent Owned)
If the Jays stick to their plan to try Brett Lawrie at second and Jose Bautista at third, even if on occasion, it'll open up a chance for more playing time for Davis.
He's averaged 43 steals in just over 400 at-bats per season since 2009.
Santiago Casilla, RHP, San Francisco Giants (7.4 Percent Owned)
Closer Sergio Romo is really, really good. Except the Giants have made it known that they won't pitch him too often on back-to-back days.
Casilla, who saved 25 games last year, could pick up 10-12 more this year even if Romo stays healthy.
Didi Gregorius, SS, Arizona Diamondbacks (2.2 Percent Owned)
The 23-year-old got the call when Aaron Hill hit the DL. While he's never shown much power or speed in the minors, he did hit two homers in his first three games since coming up.
Keep tabs if you need shortstop help.
Anthony Rendon, 3B, Washington Nationals (5.4 Percent Owned)
The 22-year-old is likely only up until Ryan Zimmerman's hammy heals, but Rendon (pictured) has a big league bat and approach. Worst-case scenario, we know the Nats aren't afraid to give him a shot as an injury fill-in.
If his debut makes him available in your keeper league's player pool, Rendon is a good one to snatch up.
Allen Webster, RHP, Boston Red Sox (0.9 Percent Owned)
The right-handed rookie, 23, looked strong in his MLB debut Sunday night (six innings, two earned runs, five hits, five strikeouts).
While he's expected to be returned to Triple-A immediately, Webster could be back up sooner rather than later.