Texas Rangers vs Arizona Diamondbacks Picks and Prediction for Sunday September 13 2026

The Texas Rangers visit the Arizona Diamondbacks at Chase Field in Phoenix, Arizona, on Sunday, September 13, 2026. First pitch is scheduled for 4:10 PM ET with coverage on MLB.TV. Texas enters at 72-76 overall and 32-44 on the road, while Arizona is 79-69 overall and 42-31 at home. The Diamondbacks won the series opener 9-1 and enter this matchup having won four of their last five games, while the Rangers have dropped three straight. At the time of this writing the odds were not released. Be sure to check out our free MLB picks for more MLB predictions throughout the season.

Starting Pitchers

Texas is scheduled to start Cal Quantrill, who enters at 8-5 with a 2.89 ERA and 1.06 WHIP through 102.2 innings. He has allowed 84 hits and 12 home runs while recording 77 strikeouts against 25 walks. Arizona counters with Eduardo Rodriguez, who is 15-5 with a 2.55 ERA and 1.20 WHIP across 173 innings. He has surrendered 151 hits and 15 home runs while striking out 128 and walking 57. Both starters have pitched at a high level, with Arizona holding the ERA and workload advantage while Texas owns the better WHIP and slightly stronger control profile.

Texas Needs Its Pitching to Keep This Game Close

Texas enters Sunday at 72-76 overall and 32-44 away from home. The Rangers are 2-3 over their last five games but have lost three straight, including a 9-1 defeat against Arizona in the series opener. Their two victories during that stretch came by scores of 10-5 and 8-6, while the other losses were narrow 4-3 and 3-2 decisions. The recent results show a team capable of generating offense but struggling to maintain consistency from game to game.

The Rangers are batting .242 with 611 runs, 1,190 hits and 171 home runs. They own a .317 on-base percentage and .399 slugging percentage. Texas' pitching staff carries a 4.33 ERA and 1.31 WHIP while opponents are batting .250. The Rangers have recorded 1,241 strikeouts against 451 walks and are 23-25 in day games.

Texas' biggest advantage comes from its power and strikeout production. The Rangers have hit significantly more home runs than Arizona and have also produced substantially more strikeouts on the pitching side. The concern is run prevention, where the overall staff ERA and WHIP both trail Arizona. With a strong scheduled starter on the mound, Texas has a better chance to stay competitive than the series-opening score suggests, but its recent three-game losing streak remains difficult to ignore.

Arizona Brings the Better Overall Form

Arizona enters Sunday at 79-69 overall and 42-31 at home. The Diamondbacks are 4-1 over their last five games and opened this series with a dominant 9-1 victory. Their other recent wins came by scores of 5-3 in 11 innings, 5-4 in 10 innings and 3-2. The lone loss during that stretch was a 5-2 defeat, giving Arizona a clear recent-form advantage entering the series finale.

The Diamondbacks are batting .243 with 657 runs, 1,203 hits and 145 home runs. They own a .315 on-base percentage and .395 slugging percentage. Arizona's pitching staff has produced a 4.08 ERA and 1.28 WHIP while opponents are batting .248. The Diamondbacks have recorded 1,020 strikeouts against 445 walks and are 31-23 in day games.

Arizona's biggest strengths are its home record, recent form and slightly better overall run prevention. The Diamondbacks lead Texas in runs scored while also owning the better team ERA, WHIP and opponent batting average. The weakness is power production, where Arizona trails Texas by a wide margin in home runs. However, with a strong scheduled starter and a 42-31 home record, Arizona appears to have the more complete profile entering Sunday's matchup.

Texas Rangers vs Arizona Diamondbacks Picks and Prediction

Pick: Arizona Diamondbacks Moneyline

The Arizona Diamondbacks Moneyline is the preferred side. Texas has a quality scheduled starter and enough power to keep this competitive, but Arizona owns the stronger overall resume entering the matchup. The Diamondbacks are 42-31 at Chase Field, have won four of their last five games and already handled Texas 9-1 in the series opener. Arizona also owns the better team ERA and WHIP while sending a starter to the mound with a 2.55 ERA across 173 innings. With Texas entering on a three-game losing streak, the home side is the more trustworthy option.

Pick: Under 8.5

Take the Under if the total is set at 8.5 or higher. Both scheduled starters enter with ERAs below 3.00, and Texas' starter carries an excellent 1.06 WHIP while Arizona's starter has allowed just 15 home runs across 173 innings. Arizona has played several tight games recently, with three of its last five finishing with seven combined runs or fewer. Texas has also been held to three runs or fewer in three straight games. At 8.5 or higher, the starting pitching matchup creates enough value to lean toward the Under.

Final Picks: Arizona Diamondbacks Moneyline and Under 8.5

This preview was completed on Saturday. Starting pitchers, betting lines and other game information are subject to change before the game begins.