Possible Duplicate:
Is the usage of “are” correct when referring to a team/group/band?
Is “a wide range of features” singular or plural?

From here:

The current crop of golfers were getting ready for the afterlife, one way or the other.

My question:

• Is this the correct verb agreement?
• I thought that of golfers was a prepositional phrase, and that crop, which is a singular noun, should dictate the verb agreement.