Collin Morikawa (T1/-10) opened the Tour Championship with career-low 61 in his 98th PGA TOUR start.
Set the tournament record for lowest opening round in the event (previous: 62/twice, most recent: 2007/Tim Clark).
Second-lowest score at East Lake (record: 60/Zach Johnson/2007/R3).
Related: Joohyung Kim after historic first at Tour Championship
Fifth first-round lead/co-lead on TOUR and second of the season (2023 The Sentry); 1-for-4 to date in converting to victory (2020 Workday Charity Open).
First player to hold at least a share of the 18-hole lead at the TOUR Championship without a win on the season, since 2019.
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Has not won on TOUR since the 2020-21 season: (2) WGC-Workday Championship, The Open Championship.
This is his fourth consecutive start at the TOUR Championship (best finish: 6th/2020)
Keegan Bradley (T1/-10) recorded is lowest score in 17 rounds at the TOUR Championship (63); marks fifth start in the event.
First TOUR Championship start since 2018 after winning the BMW Championship, his lone FedExCup Playoffs win.
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His 10th first-round lead/co-lead on TOUR (most recent: 2022 BMW Championship/T58); 0-for-9 to date in converting to victory.
Held the solo 18-hole lead at the 2011 TOUR Championship, his first appearance in the event; opened with a 64 and went on to finish T11, his best result in four previous starts
Viktor Hovland (T1/-10) has his second first-round lead/co-lead in individual stroke play events on TOUR; 0-for-1 in converting to victory.
Moved to No. 2 in the FedExCup after winning last week’s BMW Championship, his fifth career TOUR victory.
Three players who won the BMW Championship went on to win the FedExCup in the same season: Tiger Woods (2007), Billy Horschel (2014), Patrick Cantlay (2021).
In his TOUR Championship debut, Korea’s Tom Kim carded opening 67 to move up to T14. Started the day eight shots off the lead and is now five behind the new co-leaders. Traded three birdies against as many bogeys on his outward nine and then hit birdies on Hole Nos. 13, 15, 18.
FedExCup leader Scottie Scheffler carded a 1-over 71, one of seven over-par first rounds; becomes the first No. 1 seed to not hold at least a share of the first-round lead since FedExCup Starting Strokes was implemented in 2019.
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With an even-par 70, three-time FedExCup champion Rory McIlroy (T7) failed to break par in the opening round of the TOUR Championship for the first time in his 10th start in the event.
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In his first TOUR Championship appearance, Adam Schenk (T5) opened with a bogey-free 63; is one of five first-timers in the field alongside Wyndham Clark (T10), Tom Kim (T14), Taylor Moore (T28), Nick Taylor (T28).
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Tyrrell Hatton (T10) opened with a bogey-free 64, his lowest first-round score on TOUR.
 opened the Tour Championship with career-low 61 in his 98th start on the PGA TOUR.){kind=link}