World No.1 Dustin Johnson got his tournament off to a flyer with a 67 at Spyglass Hill placing him at five under, and he shares sixth alongside leading Australian Cameron Percy (66, Monterey Peninsula Country Club).
And while McIlroy is contesting a first Pebble Beach Pro-Am, Mickelson teed-up in his 22nd appearance having won the event in 1998, 2005, 2007 and 2012 while now clearly eyeing a fifth success.
"For the most part, pretty stress-free", Hossler said. "If they didn't, move on and hit as many greens in regulation as possible". "The golf course is tough because the wind can switch pretty easily".
Former world number one Lee Westwood and defending champion Brett Rumford continued to lead the way at the $1.75m Handa Super 6 in Perth on Friday.
Former world number one and 2015 US PGA Championship victor Jason Day is a shot further back following his three-under-par 69.
Kuchar has local ties.
Making his first start on the PGA Tour this season, McIlroy opened with a 4-under 68 on Thursday at Spyglass Hill, which is widely considered the hardest of the three courses in the event.
I don't know if we'll get another elite victor this week, but I do know we won't be short on views.
"Getting out first was nice", said Streelman, a two-time victor on the US PGA Tour who hit 12 of 14 fairways and 11 of 18 greens - and managed to get up and down at all seven of the greens he missed.
"Chipped in for birdie, so I was like, 'You're forgiven'".
And they are off on the Monterey Peninsula.
Chez Reavie is dealing with no such inconsistency.
Clint Eastwood is the king of Pebble Beach, and he'll be damned if anyone's gonna come on his turf and show him up on the greens. The 47-year-old, who finished in last place (65th) last year, arrived off a T5 at the WM Phoenix Open where he was a three-time champ. "All in all, you have to take all of the positives".
Rory McIlroy says his determination to become one of the greatest golfers of all time remains as strong as ever after Jason Day raised question marks over his desire. "It's a real treat". For the pro-am, the format is net best ball of the 156 pro-am teams.
McIlroy almost made another headline in referencing the oft-strained relationship between Tiger Woods and Phil Mickelson when commenting on how the team chemistry might be an issue if playing in a group with Presidents Clinton, Obama and Trump. "It's one of those courses where you can get caught up in looking at some of the views and lose focus, so you gotta remember that you're still playing a tournament".