The American golf legend died in Pittsburgh at the age of 87.
33-year-old joins fellow wildcard picks Rickie Fowler, Matt Kuchar and JB Holmes.
Palmer won seven major titles during his career but is credited with bringing golf to a global audience.
Palmer died in Pittsburgh, Pennsylvania at the UPMC Presbyterian Hospital late on Sunday (25 September).
Former world number one is set to serve under Team USA captain Davis Love III.
US captain Davis Love III has added three more players to his squad for the event in Minnesota.
The 14-time major winner has not played since August 2015 due to back problems.
The Northern Irishman completes stunning comeback ahead of the Ryder Cup at Hazeltine.
Darren Clarke completes 12-man team for duel with Team USA at Hazeltine.
Clarke will announce his three selections at Wentworth on Tuesday ahead of trip to Chaska, Minnesota.
The 27-year-old withdrew from the event amid concerns about the Zika virus.
The golfing star's swift fall from grace means he is unlikely to match Jack Nicklaus' major record.
Nike will, however, continue to operate its golf apparel and footwear business.
The 37-year-old finished one shot ahead of the world number one player.
American duo of Robert Streb and Jimmy Walker still top the leaderboard in New Jersey.
The American duo are two shots clear at the halfway stage.
The 37-year-old American is one shot clear of his rivals.
All you need to know ahead of the 98th US PGA Championship at Baltusrol Golf Club in Springfield, New Jersey.
Tiger Woods has not played a single event in 2016, and was last seen at the Wyndham Championship in August 2015.
There are two golf events in the Brazil Games - here is a history of the event and its 2016 schedule.
Fowler is among the favourites to land the coveted gold medal.
Stenson, McIlroy and Willett lead the European Points list
Swede cards a majestic 8-under 63 to lift the Claret Jug and finish the tournament 20-under par.
The American relinquishes the lead at Royal Troon as Stenson eyes maiden major title.
2013 champion leads by a single shot ahead of Henrik Stenson.
Mickelson finished 63 eight under par.
Royal Troon is set to stage one of the highlights of the British sporting summer.
Golf is returning to the Olympic programme for the first time since 1904.
The 22-year-old star has become the latest big-name player to pull out of the event.
Colin Montgomerie will hit the first ball at Royal Troon.