Mariners vs Athletics Prediction, Pick and Preview, September 21 (9/21): MLB

Mariners vs Athletics Prediction, Pick and Preview, September 21 (9/21): MLB

  • Ajay
  • Ajay
  • Sep 21, 2021, 10:37:45 PM

Credit: photo by Stan Szeto-USA TODAY Sports

Time 9:40 p.m. EST
Mariners money line +128
Mariners run line +1.0 (-125)
Athletics money line -133
Athletics run line -1.5 (+150)
Over / under 8.5 (-110)


Key stats
  Mariners Athletics
Record 81-69 82-68
Road / home record 39-36 40-35
Last 10 record 5-5 6-4
Streak W2 L1
Over / under record 77-69-4 68-76-6
Runs / game 4.26 4.59
Runs allowed / game 4.66 4.15



Seattle is back at the Oakland Coliseum for a game two matchup against the Athletics in an AL West matchup.  They won game one by a 4-2 scoreline last night and lead the series 1-0.  It was their 3rd win in their last 4 games and are coming off of a 2-1 series win against the Royals.  Seattle is only a game behind the A's in the division and both are still in the hunt for a Wild Card spot.  Oakland's loss to Seattle last night snapped a five-game winning streak.  This series could determine if one of the AL West teams can grab onto one of the available Wild Card spots in a race that looks almost certain to go down to the wire. 

Pitching matchup


Marco Gonzales (8-5, 4.05 ERA) Marco Gonzales will start for the 23rd time this season for the Seattle Mariners.  Gonzales has a 2021 ERA of 4.05 and is a career 4.06 ERA pitcher.  He also has a 1.19 WHIP in 2021.  Gonzales is 1-0 from 3 appearances against Oakland this season.  In those games, he gave up 12 hits for 6 ERs from 15.2 innings pitched and walked 3 batters while striking out 12 more.  


Paul Blackburn (1-2, 4.94 ERA) Paul Blackburn now in his fifth season in the majors, will start for the A's.  He has a 4.94 ERA with a 1.57 WHIP in 2021.  He faced the Mariners once so far this season pitching 5.2 innings and surrendering 5 hits for 2 ERs and had 5 strikeouts and no walks.  He had a 3.18 ERA in that game.


With both teams trying to end the season on a high and qualifying for the playoffs, defenses could be buttoned up for this season as was evidenced last by a 4-2 scoreline.  It looks like another low-scoring tight affair tonight in Oakland.  The over / under at 8.5 is too high. 

PICK: Under 8.5 (-110)

Find more sports picks from the top sports bettors and MLB experts all in one place using our iOS and Google Play apps, as well as our other articles at  We are the home for MLB picks, sports picks and sports betting.

Winnings $57,370
last 30 days winnings $0
Yesterday winnings $0
Top Sport MLB
W-L-D 795 - 676 - 48
Winnings % 51%
Winnings $55,355
last 30 days winnings $0
Yesterday winnings $0
Top Sport NCAAB
W-L-D 157 - 92 - 4
Winnings % 62%