Casey goes for 3-peat at Innisbrook against top-heavy field

Dustin Johnson watches his drive down the ninth fairway during the final round of the RBC Heritage golf tournament in Hilton Head Island, S.C., Sunday, April 18, 2021. (AP Photo/Stephen B. Morton)

Paul Casey, of England, hits on the 12th hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP Photo/Charlie Riedel)

PALM HARBOR, Fla. — Paul Casey is going for his third straight victory at the Valspar Championship, a feat difficult enough that only eight times in the last 40 years has a player won the same tournament at least three times in a row.