A view of the prototype 913D2 in the play position.

Titleist Tour Rep Chris Tuten gives Titleist Brand Ambassador Bobby Gates more details about the new 913 driver.

Monday marked the official start to the tour seeding and performance validation for Titleist's new prototype 913D2 and 913D3 drivers.

Where there are new prototype drivers, there are also new prototype driver headcovers.

Titleist Brand Ambassador Brendan Steele, deep in discussion with Titleist Tour Reps Scott Cuppett (left) and Larry Bobka.

A close look at the sole of the prototype 913D2.

Bobby was eager to put the new prototype to the test. Here's a good look of the 913D3 at address.

A good look at the toe and crown of the prototype 913D3.  If you compare this photo to the same shot of the prototype 913D2, you'll notice that the back edge of the 913D3 is a little deeper.

A view of the prototype 913D3 in the play position.

A closer look at the prototype 913D2 toe.