Valero Texas Open. Here's what You Oughta Know heading into the final round at TPC San Antonio. Stats provided by the Golf Channel editorial research unit.
• Saturday was the most difficult non-major round on PGA Tour this season (field average: +2.34)
• Only rounds 1 and 2 of Masters played tougher
• 23.2 percent of players with one-shot, 54-hole lead go on to win in the last five PGA Tour seasons
• Sixth time in 2017 a player has led by one shot after 54 holes
• None of previous five players went on to win the tournament
• Four of last six winners at TPC San Antonio led or co-led after 54 holes
• 21 of 22 winners this season (stroke play events) were T-6 or better after 54 holes
• Largest 54-hole deficit overcome to win this season: four shots (five instances)
• Kevin Chappell is seeking his first PGA Tour win, and this is the first time he has held the outright lead after 54 holes.