Munster suffered a blow when Warwick was caught in the face by a stray leg and with no Ronan O'Gara on the bench had to turn to Conan Doyle, an elementary replacement at fly-half.
But he will be pushing for a starting place against Leeds on Saturday after helping turn the Welsh side's fortunes around after coming off the bench against Middlesbrough and Coventry.
The unexpected turn-of-events occurred early in the day when Muhammad asked to speak to the judge in a bench conference, unable to be heard by the jury.
For now, the Yankees will likely turn to veterans Matt Diaz and Juan Rivera, both 34, dependable but unspectacular players who were fighting for bench jobs before Granderson's injury.