I am curious since i really have heard so many different oppinions.worst thing is my shoulder is hurt so i cant try pitching to try any out and im just litterally killing myself over this
I saw a video on the grip that mariano uses . he showed it directly. he held it like a 4 seamer and then shifted his fingers to the right seam and threw.
i believe mariano rivera throws his the same way roy halladay does, and the way i do. This is the grip.
the thrid post down it shows it.
He grips it off-center from a 4-seam fastball. Late movement and in the low 90's.
that looks like the grip that i thought he used