2021 U.S. Open: This may be Phil Mickelson's last, best chance to complete the career grand slam | CBS Sports Headlines 2021 U.S. Open: This may be Phil Mickelson's last, best chance to complete the career grand slam Is Lefty actually going to win back-to-back majors in his early 50s? … Continue reading 2021 U.S. Open: This may be Phil Mickelson's last, best chance to complete the career grand slam