Some of the Major Leagues' top pitchers will take the mound today, with Max Scherzer's return to Chase Field leading the group.
Scherzer leads the National League in ERA (2.01), FIP (2.56), strikeout rate (35.7) and WHIP (0.80), giving him frontrunner status for the NL Cy Young Award, which he won in 2016. He'll try to continue that run at 9:40 p.m. ET as part of a full slate of games, streaming live on MLB.TV.
Scherzer was selected in the first round of the 2006 Draft by the D-backs and Mike Rizzo, then Arizona's vice president of scouting and currently the Nationals' president of baseball operations. In six career starts against his first MLB team, he's put up a 2.41 ERA and 55 strikeouts in 41 innings.
Taking the ball for the D-backs will be either Zack Godley or Matt Koch, as Arizona needs to reshuffle its rotation with Taijuan Walker on paternity leave.
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Here's what to watch for throughout the day (all times ET):
Darvish sets the market: TEX@TB, 7:10 p.m.
While the fourth-place Rangers are currently not active sellers, how they perform until the non-waiver Trade Deadline could impact the availability of certain players. Yu Darvish could be one of those names, given he'll be a free agent at the end of the season and certain to fetch a hefty haul in a trade.
With that in mind, Darvish could impact his own destiny as he takes the mound against the Rays, against whom he owns a 1.09 ERA and a 10.9 K/9 in five career starts.

Wood on fire: ATL@LAD, 10:10 p.m.
Fourteen starts into 2017, Alex Wood still has yet to take a loss.
Wood is still a few starts shorts of qualifying for MLB's leaders due to a trip to the disabled list earlier in the season, but his stats are some of the most impressive in the game.
The herky-jerky southpaw set a Dodgers record for most consecutive wins to start a season with 11. His 1.56 ERA would lead the Majors if he qualified, while his strikeout and ground-ball numbers this season both put him in elite territory.