Dustin Johnson upstaged Jordan Spieth and Jason Day Thursday in the first round of the Memorial Tournament where the 2015 US Open runner-up shot a first round eight-under 64. The hard-hitting American rolled in 10 birdies for a one-stroke lead over Brendan Steele who is alone in second with a 65. World number one Day shot a six-under 66 with an eagle, six birdies and two bogeys while two-time major winner Spieth shot a two-under 70 with five birdies.
