Hayes (wrist) will start his rehab assignment Saturday with Triple-A Indianapolis, Alex Stumpf of DKPittsburghSports.com reports.
Any temptation to rush Hayes' return was eliminated when the Pirates transferred the third baseman to the 60-day injured list May 9, so Hayes will have at least a couple weeks to find his swing and ensure he's ready to rejoin the big-league squad. It's safe to assume that the Pirates will continue exercising caution with Hayes, considering his bright future and the team's lack of competitiveness in 2021.