C

From SoSH

Clutch Number -- Created by Bill James and co-opted by URISoxFan (Jeff Kuhn), this is a component of James' Runs Created formula. It measures home runs hit with men on base (relative to normal level), plus hitting with runners in scoring position (relative to normal level). The formula is:

C# = [HRmob - (ABmob * (HR/ab)] + (Hrisp - (BA * ABrisp)

where mob = men on base, and risp = runners in scoring position.