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Padres vs Mariners Prediction 4/16/26 MLB Picks Today

Seattle Mariners (8-11) vs. San Diego Padres (12-6)
April 16, 2026 8:40 pm EDT
The Line: San Diego Padres 100 / Seattle Mariners -120; Over/Under: 8
(Get latest betting odds)

The Seattle Mariners and San Diego Padres meet Thursday in MLB action at Petco Park. Here’s a Padres vs. Mariners Prediction. This article will include a Padres vs. Mariners Pick.

Seattle Mariners Betting Preview

The Seattle Mariners are 8-11 on the year and play the Rangers and Athletics next. The Seattle Mariners are batting. 209 on the season, have a .319 OBP, and have a .340 slugging percentage. The Seattle Mariners pitching staff has a 3.24 ERA and a 1.08 WHIP. Randy Arozarena leads the Seattle Mariners with 20 hits and 7 RBI while Brendan Donovan and Luke Raley have combined for 35 hits and 20 RBI.

Luis Castillo gets the ball for the Seattle Mariners, and he is 0-0 with a 6.92 ERA and 14 strikeouts this season. Castillo is 3-3 with a 3.71 ERA and 55 strikeouts in his career against the San Diego Padres.

San Diego Padres Betting Preview

The San Diego Padres are 12-6 on the year and play the Rockies and Angels next. The San Diego Padres are batting. 236 on the season, have a .310 OBP, and have a .394 slugging percentage. The San Diego Padres pitching staff has a 3.42 ERA and a 1.23 WHIP. Ramon Laureano leads the San Diego Padres with 19 hits and 12 RBI, while Jackson Merrill and Xander Bogaerts have combined for 37 hits and 26 RBI.

Walker Buehler gets the ball for the San Diego Padres, and he is 0-1 with a 4.97 ERA and 11 strikeouts this season. Buehler is 1-1 with a 7.08 ERA and 19 strikeouts in his career against the Seattle Mariners.

Why the San Diego Padres will win

  • The home team has won each of the Mariners’ last 11 games.
  • The Mariners have lost each of their last six games as road favorites after playing the previous day.
  • The underdogs have covered the run line in each of the Mariners’ last six games at Petco Park.
  • The Mariners have failed to cover the run line in each of their last six games as road favorites after playing the previous day.
  • The Mariners have trailed after 5 innings in each of their last five games as road favorites.
  • The Padres have led after 3 innings in four of their last five games as underdogs against AL West opponents.

Why the Seattle Mariners will win

  • The Mariners have won six of their last seven games against the Padres following a loss.
  • The Padres have lost eight of their last nine Thursday games against American League opponents.
  • The Mariners have covered the run line in eight of their last nine games at Petco Park against teams that held a winning record.
  • The Padres have failed to cover the run line in each of their last seven Thursday night games against American League opponents.
  • The Mariners have won the first inning in four of their last five games as favorites.
  • The Padres have trailed after 3 innings in five of their last six night games against American League opponents that held a losing record.
  • The Padres have trailed after 5 innings in six of their last seven night games against American League opponents that held a losing record.

Total Runs Facts

  • Six of the Padres’ last seven games after playing the previous day have gone OVER the total runs line.
  • Five of the Mariners’ last six games as road favorites have gone UNDER the total runs line.
  • The ‘Inning 1 UNDER 0.5 runs’ market has hit in each of the Padres’ last seven games against American League opponents.
  • The ‘Inning 1 UNDER 0.5 runs’ market has hit in each of the Mariners’ last four games against National League opponents.

San Diego Padres Player Prop Facts

  • Jackson Merrill has recorded at least one hit in each of the Padres’ last 11 home games against opponents that held a losing record.
  • Xander Bogaerts has hit a home run in three of his last five appearances in night games.

Seattle Mariners Player Prop Facts

  • Luis Castillo has recorded six or more strikeouts in each of his last 13 appearances against NL West opponents.
  • Luis Castillo has recorded a win in five of his last six appearances with his team as a road favorite against NL West opponents.
  • Randy Arozarena has recorded at least one hit in each of the Mariners’ last eight night games against NL West opponents that held a winning record.
  • Luke Raley has hit a home run in two of his last three appearances in night games against teams that held a winning record.

Matchup/League Facts

  • The Padres rank 2nd in the league for home runs allowed this season (11).
  • The Padres rank 3rd in the league for doubles this season (39).
  • The Mariners rank 1st in the league for walks allowed this season (40).
  • The Mariners rank T2nd in the league for walks this season (86).

Padres vs Mariners Prediction

We were on the Padres yesterday and there’s no reason to stop now. This team simply has some magic to them and the wins keep piling up. Last night’s win only adds to the confidence and it’s also going to be tough for the Mariners to get off the canvas after such a loss. Castillo was horrible in his last outing and it’s hard to get behind a 6.92 ERA and 1.77 WHIP through 13 innings. Another bad start or two and we might have to have a tough conversation about Castillo. Either way, I’m not stepping in front of this Padres team that’s sprinkled with fairy dust or whatever. Give me the Padres.

Randy Chambers's Free Pick: San Diego Padres 100

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Randy Chambers

Randy has covered sports betting since 2014 and writes about everything from NFL to WNBA. Follow Randy Chambers on Twitter.

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