The playoff races throughout MLB are really starting to heat up, and there is more emphasis placed on every single game this time of the year. There is a full slate of MLB games ready to take place on Sunday, August 21st, and that means you have plenty of betting options.
Making a pre-game wager is one way to go, but you can also look at player props for each game. Below are five of the best MLB player prop picks to make for Sunday, August 21st.
Luis Castillo Under 6.5 Strikeouts (+106)
Luis Castillo and the Seattle Mariners are in Oakland to face the Athletics. Seattle is a big favorite in this game as Oakland has been one of the worst teams in baseball this season.
Castillo has had mixed results this season, but he is capable of pitching well and taking over a game. Getting to seven strikeouts is never easy, though, even for the best pitchers in baseball.
Take the under 6.5 strikeouts, as Castillo won’t record more than six in this game.
Paul Goldschmidt to Record an RBI (+125)
Cardinals vs. Diamondbacks Pick
The St. Louis Cardinals are on an absolute roll, and that offense is putting up huge numbers every single night. Paul Goldschmidt will likely win the MVP Award in the NL as he just continues to hit.
The Cardinals have a number of offensive weapons to choose from. Taking Goldschmidt at +125 to record an RBI feels like a safe bet as the Cardinals will score some runs in this game.

Sandy Alcantara 7+ Strikeouts (+138)
Sandy Alcantara is likely the Cy Young Award winner in the National League, and he should be considered for the MVP Award as well. Alcantara and the Miami Marlins will take on the Los Angeles Dodgers on Sunday, and that team continues to be loaded with talent.
Alcantara goes at least seven innings in almost every start he makes and racks up the strikeouts in the process. The over/under for strikeouts is a bit low for this game since the Dodgers are the opponent, but it doesn’t matter with Alcantara.
Look at the alternate strikeouts and take Alcantara 7+ strikeouts in this game.
Patrick Corbin Under 4.5 Strikeouts (-135)
The Washington Nationals are in San Diego to face the Padres on Sunday afternoon, and the visitors have a 2-1 series lead. Patrick Corbin will be on the mound for the Nationals in this game, and he has really struggled this season.
Corbin could always turn things around at any point, but this could be another rough start for the lefthander. Take the under 4.5 strikeouts as the Padres have little trouble having a big night at the plate.
Cedric Mullins to Record 2+ Total Bases (+110)
Sunday Night Baseball features the Boston Red Sox taking on the Orioles in Baltimore. These MLB teams have split the first two bouts of this series, and it should be a battle in this matchup.
Baltimore has been sliding a bit of late, and they need their best players to step up and deliver. Cedric Mullins is one of those players, and this could be a big night at the plate for the young star.
Take Mullins to record 2+ total bases at +110 as he helps get the Orioles going on offense.