Bassitt (elbow) underwent successful Tommy John surgery Friday, Joe Stiglich of CSN California reports.
With the procedure out of the way, Bassitt is now ready to embark on the long road back to the major leagues. He will begin what is typically a 12-to-16 month rehab process Monday in Oakland. Sean Manaea and Jesse Hahn are currently rounding out the A's rotation, with Henderson Alvarez (shoulder) still rebuilding strength in the minors.