Cincinnati Reds vs Arizona Diamondbacks Picks and Prediction for Friday August 21, 2026

The Cincinnati Reds travel to Chase Field in Phoenix, Arizona, to face the Arizona Diamondbacks on Friday, August 21, 2026. First pitch is scheduled for 9:40 PM ET with coverage on MLB.TV. Cincinnati enters the matchup at 61-66 overall and 29-31 on the road, while Arizona is 67-61 overall and 36-27 at home. The Reds have gone 2-3 over their last five games, while the Diamondbacks are also 2-3 over that span. At the time of this writing the odds were not released. Be sure to check out our free MLB picks for more baseball predictions and betting analysis.

Starting Pitchers

Nick Lodolo gets the start for Cincinnati with a 3-2 record, 4.52 ERA, and 1.42 WHIP through 71.2 innings. He has allowed 73 hits while striking out 57 and walking 29, with 12 home runs surrendered. Arizona counters with Eduardo Rodriguez, who is 12-4 with a 2.71 ERA and 1.21 WHIP over 149.1 innings. He has allowed 134 hits, struck out 106, walked 47, and surrendered 14 home runs. The starting-pitching advantage clearly belongs to Arizona based on both run prevention and overall consistency.

Cincinnati Searches for More Offensive Consistency

Cincinnati enters Friday at 61-66 overall and 29-31 on the road. The Reds are 2-3 over their last five games and most recently defeated St. Louis 5-4. They also picked up a 6-5 extra-inning victory during that stretch, but the offense has been held to one run or fewer in three of the last five games.

The Reds are batting .226 as a team with 514 runs, 951 hits, and 164 home runs. Cincinnati carries a .305 on-base percentage and .391 slugging percentage. The pitching staff owns a 4.48 ERA and 1.40 WHIP while allowing opponents to bat .246. The staff has recorded 1,033 strikeouts while issuing 525 walks.

The power numbers give Cincinnati some upside, but the low batting average and on-base percentage make sustained rallies difficult. The Reds have hit more home runs than Arizona, but their overall offensive efficiency remains a concern, especially against a starter carrying a 2.71 ERA.

Arizona Holds the Stronger Overall Profile

Arizona comes into the matchup at 67-61 overall and 36-27 at Chase Field. The Diamondbacks are 2-3 over their last five games, though they snapped a three-game losing streak with a 7-6 extra-inning win at Boston. Their recent stretch has included some volatile results, with Arizona scoring seven or more runs twice but also being held to four runs or fewer in three games.

The Diamondbacks are batting .243 with 579 runs, 1,044 hits, and 126 home runs. They have a .316 on-base percentage and .398 slugging percentage. Arizona's pitching staff owns a 4.18 ERA and 1.29 WHIP while opponents are batting .252. The staff has issued only 373 walks, considerably fewer than Cincinnati's 525.

Arizona does not have Cincinnati's home-run total, but the Diamondbacks have been the more efficient offense and have the better pitching numbers entering this game. Their 36-27 home record also gives them another meaningful edge in a matchup where the starting-pitching gap already favors the home side.

Cincinnati Reds vs Arizona Diamondbacks Picks and Prediction

Pick: Arizona Diamondbacks Moneyline

Arizona has the better overall record, stronger home record, and more favorable starting-pitching matchup. The Diamondbacks enter at 67-61 compared with Cincinnati's 61-66, while their starter brings a 2.71 ERA and 1.21 WHIP against a Cincinnati starter at 4.52 and 1.42. Arizona also owns the better team batting average, on-base percentage, ERA, and WHIP. Cincinnati's power gives the Reds upset potential, but the more complete profile belongs to Arizona. Take the Arizona Diamondbacks on the moneyline.

Pick: Under 8.5

Cincinnati has been held to one run or fewer in three of its last five games, and Arizona brings the stronger starting pitcher into the matchup. The Reds are batting only .226 with a .305 on-base percentage, while Arizona's pitching staff carries a 1.29 WHIP. Arizona has also been inconsistent offensively enough to make a high-scoring game far from automatic. Take the Under if the total is set at 8.5.

Disclaimer: This preview was completed before play on Thursday.