Observations: On paper, Europe has the clear golf ball advantage in foursomes. With defined clusters of players using the same model—e.g. Straka, Lowry, Hojgaard, Rahm, Hatton and Åberg—the ball ...

What you need to know: Gearheads are very familiar with the name X Forged. Introduced in 2007, Callaway's cavity-back model was immediately adopted on tour and earned a spot in Phil Mickelson's bag.