Guest broadcaster, Michael Coffin AA Corpus Christi Radio, joins Astros broadcaster Steve Sparks in West Palm Beach as the Stros host the Miami Marlins. MLB.COM’s beat writer Brian McTaggart joins the radio booth during Tuesday’s broadcast against the Cardinals in Jupiter. Tune in LIVE on SportsTalk 790 in Houston and on the MLB app, TuneIn and SiriusXM as Sparks and Coffin bring you the play-by-play action.