This has been happening quite often this season which is rather frustrating when playing in competitive dynasty leagues requiring daily activity. Trading, free agent transactions hinge on up-to-date stats and player rankings.
Yahoo player stats and rankings have not updated on player profiles since games resumed following the all-star break.
Game log stats are still accurate in the player notes mini-window as well as full-page player profiles. But cumulative stats are not being updated.
I.E. - Anthony Rendon is still showing .304 AVG, .959 OPS, 16 HR, 54 RBI when after July 15 games his statline should be: .315 AVG, 1.002 OPS, 18 HR, 61 RBI.