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21. Chicago Cubs Lineup: Nico Hoerner, 2B; Michael Busch, 1B; Seiya Suzuki, RF; Ian Happ, LF; Christopher Morel, DH; Dansby Swanson, SS; Miles Mastrobuoni, 3B; Tomas Nido, C; Pete Crow-Armstrong, CF Cubs vs Diamondbacks

2. Pete Crow-Armstrong's defense in center and Miles Mastrobuoni's defense at third have both been difference-makers lately. Cubs vs Diamondbacks

3. Mike Tauchman is back with the team, but Craig Counsell is running with Pete Crow-Armstrong in center and Miles Mastrobuoni at third.

4. Christopher Morel has started to heat up, and Ryne Nelson has significant reverse splits this season.

5. Justin Steele, the Cubs' ace, is on an incredible run with nine consecutive quality starts and just 10 ER total over his last 61.0 IP.

6. Steele's most recent outing included 7.0 shutout innings against one of the best teams in baseball (Baltimore).

7. Ryne Nelson's last three starts before the All-Star break were impressive, with significant improvement in his performance.

8. Nelson tweaked his approach in his last three games, throwing his fastball more often.

9. The Cubs need to win as much and as soon as possible to avoid a sell-off.

10. The upcoming series against Arizona and the Brewers are critical for the Cubs' playoff hopes.