Apr 15, 2026; San Diego, California, USA; San Diego Padres right fielder Nick Castellanos reacts after striking out during the ninth inning against the Seattle Mariners at Petco Park. All MLB players are wearing number 42 today to honor Jackie Robinson. Mandatory Credit: Denis Poroy-Imagn Images
Denis Poroy-Imagn Images

Seattle Mariners vs San Diego Padres Prediction 4/16/2026 Today’s MLB Picks

Pick details

MATCHUP Seattle Mariners San Diego Padres
Team Records 8-11 12-6
Where Petco Park, San Diego, California
When Thursday, April 16, 2026
Time 08:40 PM EDT
TV MLB.TV

The Seattle Mariners and the San Diego Padres will meet on Thursday night at Petco Park in San Diego, California.

Seattle Mariners Betting Preview

The Seattle Mariners enter Thursday’s game with an 8–11 overall win‑loss record, including an abysmal 1–7 mark on the road, placing the team fourth in the American League West. More recently, in the Mariners 9–6 victory over the Houston Astros six days ago, Seattle outfielder Randy Arozarena tallied 2 hits (1 home run), 3 RBIs and 1 run scored showcasing his ability to lead the Mariners offense.

Seattle will turn to right‑hander Luis Castillo in this contest. In three starts made in the 2026 regular season, Castillo has posted a below average 6.92 ERA, 14 strikeouts, and a 1.77 WHIP, while allowing 19 hits and 4 walks in 13.0 innings pitched. Castillo will look to rebound from a poor performance in his last outing. Let me be more specific. In the Mariners 8-7 win over the Houston Astros five days ago, Castillo allowed 7 earned runs, 10 hits, 1 home run and 1 walk.

The Seattle Mariners return a quality lineup featuring outfielders Luke Raley and Randy Arozarena. Raley leads the team with 4 home runs, a .339 batting average, 10 RBIs and a 1.035 OPS which ranks 26th in Major League Baseball. Randy Arozarena enters this contest with a rather impressive .299 batting average, 4 doubles, 7 RBIs and an .823 OPS providing the Mariners with a strong offensive core.

San Diego Padres Betting Preview

The San Diego Padres enter Thursday’s contest with a 12–6 overall win‑loss record, including an 8–4 mark at home this season. Two days ago, in the Padres 4–1 win over the Seattle Mariners, San Diego outfielder Jackson Merrill amassed 3 hits (1 double), 2  runs scored and 1 walk, demonstrating his ability to perform at a high level.

San Diego will turn to right‑hander Walker Buehler tomorrow night. Through two starts made this season, Buehler has compiled an 0–1 win-loss record, a 4.97 ERA, 11 strikeouts, and a 1.26 WHIP, while allowing 11 hits, 5 walks and 1 home run across 12.2 innings pitched.

Shifting our focus to the San Diego offense, the Padres will continue to rely on Gavin Sheets and Jackson Merrill, both of whom remain pivotal to the Padres offensive production. Outfielder Gavin Sheets has compiled a .241 batting average, 2 home runs, 7 doubles, 6 RBIs, 1 stolen base and a .749 OPS, while outfielder Jackson Merrill has amassed a .261 batting average, 3 home runs, 2 doubles, 13 RBIs, 4 stolen bases and a .784 OPS.  

Why the Seattle Mariners will win.

• Offensive upside. Luke Raley and Randy Arozarena continue to anchor a productive lineup.

• Elite staff baseline. Despite Castillo’s early struggles, Seattle’s overall starting pitching rotation remains one of the best in Major League Baseball.

• Enhanced motivation. The Seattle Mariners have lost two consecutive games.

Why the San Diego Padres will win.

 • Home field advantage. The San Diego Padres have played competitive baseball at Petco Park (8–4).

• Lineup depth. Gavin Sheets and Jackson Merrill continue to drive the Padres offense.

• Current form. The San Diego Padres arrive at Thursday night’s contest on the heels of a seven-game winning streak

Seattle Mariners vs. San Diego Padres Prediction

In my view, the San Diego’s current form tells me that the Padres can stay inside the number (1.5) in this game. Additionally, the Seattle Mariners arrive at tomorrow’s game playing below average baseball (two-game losing streak). I fully expect the San Diego Padres formidable offense to be productive in this contest as well. With that said, I am backing the Padres plus the 1.5 runs in this game.

Hans Geevers's Pick: San Diego Padres +1.5