Frankoff was released by the Diamondbacks on Wednesday.

Frankoff (forearm) was reinstated from the 60-day injured list and optioned to Triple-A Reno on Wednesday.

Frankoff (forearm) completed his second rehab start at Triple-A Reno on Friday, working 4.2 innings while surrendering five runs on four hits and four walks.

Frankoff (forearm) was transferred to the 60-day injured list Tuesday.

Frankoff hit the 10-day injured list with right forearm soreness Friday.

Frankoff pitched the eighth inning of Thursday's 7-4 loss to the Brewers, giving up a run on three hits in the 17-pitch appearance.

Arizona pitching coach Matt Herges thinks Frankoff may have been tipping pitches in Saturday's loss to the Cardinals, Nick Piecoro of the Arizona Republic reports.

Frankoff is scheduled to start Friday's game against the Rockies in Colorado.

Frankoff hurled 4.2 innings against Washington on Saturday, allowing two runs on three hits and four walks while striking out four.

Frankoff will start for the Diamondbacks against the Nationals on Saturday, Zach Buchanan of The Athletic reports.