The Rangers have an MLB-best +145 run differential, and their offense has a ton to do with it. Texas currently leads in the majors in runs scored with 415, which is 14 runs better than the team with the best record in the sport the Tampa Bay Rays. They also lead the league in batting average, hitting .272 as a team, and on-base percentage at .341. Add in being an elite extra-base hitting team by being 4th in doubles (145) and 7th in home runs (90) and the Rangers have been undeniably the best offense in the sport.
The diversity in production they are getting across their lineup is also noteworthy. Texas has nine players with 45 or more hits and 26 or more RBI. This includes four players with 40+ RBI headlined by Adolis Garcia (54) and Marcus Semien (53) who are 3rd and 4th respectively in the MLB in runs batted in. Plus, they have eight players hitting .272 or better with youngsters Ezequiel Duran (.295) and Leody Taveras (.305) leading the way. One of their biggest standouts has been rookie third baseman Josh Jung who looks like the AL Rookie of the Year. Jung is hitting .283 with 13 doubles, 1 triple, 13 home runs, and 40 RBI and has been an MVP performer in a deep Rangers lineup. This mixture of productivity has been crucial and encouraging for their future as their core is young and just starting to blossom.
On the pitching side, the Rangers have made drastic improvements thanks to key offseason additions and the growth of young arms. The Rangers went into this past offseason knowing they needed a complete overhaul of their starting pitching to give themselves a chance to compete. They got aggressive in free agency signing stars Jacob DeGrom and Nathan Eovaldi to bolster their rotation. Thanks to these moves along with the improvement from Jon Gray and the emergence of Dane Dunning the Rangers now sit with a 3.78 ERA – 6th in the MLB. They also rank 6th in earned runs allowed (250 runs), 2nd in home runs allowed (66), and 3rd in WHIP (1.20). The Rangers also have eight pitchers with ERAs of 3.80 or better including four of their current starters. Their main standouts include offseason signee Nathan Eovaldi (9-2, 2.49 ERA, 83 K's, 86.2 IP) who has been their ace thus far. Plus, Jon Gray is 5th in the league in ERA at 2.32, while Dane Dunning has pitched to a 2.76 ERA in 15 appearances, 7 starts this year. Now they will have to manage the rest of the year without big money signing Jacob DeGrom who is out due to Tommy John Surgery. But they have the depth in the rotation to hopefully move forward.
The Arizona Diamondbacks similarly to Texas finished 4th in their division last year with 74 wins – 37 games back of the LA Dodgers. Now they own a 41-27 record and are 3 games clear of the usual division favorites the Los Angeles Dodgers.
The D-Backs offense has been a huge reason this young team has risen to the top of the NL West. As their +28-run differential is supported by their ability to outscore teams in a variety of ways. Arizona is tied for 3rd in batting average at .264, 5th in runs scored (351), and 8th in on-base percentage (.329). They've also utilized the running game as a big weapon, tallying 64 stolen bases which places them 5th in the MLB. Throw in that they are 2nd in triples (16) and 4th in doubles (139) and they hit the ball from gap to gap consistently – using their team speed to take extra bases also. Arizona has surprised many with how good their offense has been this year and they have many contributors to this both top prospects and unheralded performers.