A.J. Griffin (ankle) will throw a light bullpen session Monday.
He could throw another one Wednesday. Working his way back from gout in his left ankle, Griffin is eligible to return on Friday against the Angels and seems likely to start then assuming all goes well.
Paul Goldschmidt is absent from the Diamondbacks' lineup Monday.
It's Goldschmidt's first day off of the season. The D'Backs are going with Chris Herrmann in his place at first base.
Ian Desmond (hand) took batting practice on Monday.
It's the first time he's taken BP on the field since he suffered a fracture in his left hand in mid-March. The Rockies haven't said when Desmond would begin a rehab assignment, but it should be just right around the corner. A return in early May is looking likely.
German Marquez is expected to start on Tuesday against the Nationals.
It's the first time the Rockies have needed a fifth starters since Jon Gray (foot) went down. Marquez hasn't officially been added to the roster yet, but he was spotted in the clubhouse Monday. The righty figures to make a handful of starts with Gray still a few weeks away from a return.
Bryce Harper is not in the Nationals' lineup Monday.
It's Harper's first day off of the season, as he had started each of the team's first 18 games. The timing is unfortunate for his fantasy owners given that the day off comes at Coors Field. Adam Eaton will slide over to right field and Michael Taylor will get a start in center. The Nationals also have Jose Lobaton at catcher over Matt Wieters.