Snake bites

• Recovering from a mild concussion after being hit in the helmet with a pitch on Saturday, D-backs shortstop Didi Gregorius likely will play in extended spring games in Scottsdale on Thursday and Friday. The hope is Gregorius will join the team in San Diego on Saturday, when he is eligible to come off the seven-day concussion disabled list.

The D-backs will have Gregorius take an impact test again, then turn in that information to Major League Baseball so he can be cleared to play. The rookie already has passed the written portion of the concussion protocol test.

• The D-backs promoted right-hander Archie Bradley to Double-A Mobile on Wednesday. Ranked by MLB.com as the club's No. 2 prospect and the No. 24 prospect in all of baseball, Bradley made five starts for Class A Advanced Visalia this season, striking out 43 and allowing just four earned runs over 28 2/3 innings for a 1.26 ERA.