Among his clients are Sheikh Mohammed's Godolphin Racing and Sheikh Hamden's Shadwell Racing. McLaughlin won his first Grade I race in 2003 with Lunar Sovereign in the Man o' War Stakes. In 2006, he trained Shadwell's colt Jazil, who won the Belmont Stakes, and had enormous success with Invasor, Shadwell's newly acquired four-year-old Argentinian colt.
McLaughlin has worked with notable clients including Sheikh Mohammed's Godolphin Racing and Sheikh Hamdan's Shadwell Racing. He secured his first Grade I triumph in 2003 with Lunar Sovereign in the Man o' War Stakes, and subsequently trained Shadwell's colt Jazil to a Belmont Stakes victory in 2006, along with achieving considerable success with Invasor, a four-year-old Argentinian colt purchased by Shadwell.