Before you set your PGA DFS lineups on sites like DraftKings and FanDuel for the 2019 Valero Texas Open, you need to hear what Mike McClure has to say. McClure is a DFS pro with nearly $2 million in career winnings, and he's been red-hot on his PGA Tour picks.

Two weeks ago at the Valspar Championship, McClure built his FanDuel and DraftKings lineups around Paul Casey. The result: Casey fired three rounds of 70 or better on his way to a score of 8-under par and a first place finish. Anybody who had him in their lineup was well on their way to a HUGE weekend.

Now, he's set his sights on the 2019 Valero Texas Open and revealed his optimal DFS lineups. They're a must-see for any PGA DFS player.

One player McClure is rostering this week: Rickie Fowler ($12,500 on FanDuel, $11,700 on DraftKings), who's finished second or better in two of his last five starts on the PGA Tour. He's an almost sure-fire bet to be near the top of the leaderboard come Sunday. He's also targeting Jimmy Walker at $9,700 on FanDuel and $7,800 on DraftKings. Walker loves playing at TPC San Antonio, having finished 16th or better in four of his last five starts at the Valero Texas Open.

McClure is also targeting an undervalued player who's primed to blow up this week, giving you a huge return on sites like DraftKings and FanDuel. Picks like these could be the difference between winning your DFS contests or going home with nothing. You ABSOLUTELY need to see them before locking in any lineups.

So what 2019 Valero Texas Open lineups should you enter on DraftKings and FanDuel? And which undervalued player is a must-roster? ... Join SportsLine here to see the complete optimal tournament lineups for the Valero Texas Open, all from the man who's made nearly $2 million in daily fantasy sports!