Kevin Na won the Charles Schwab Challenge at Forth Worth in Texas in May
American Kevin Na withdrew from The Open due to an injury in which Rory Sabbatini came in as his replacement for Royal Portrush.
World number 34 After last taken out of the 3M Open after the first round with a neck problem.
Slovak Sabbatini gets his chance, with American Brian Harman now first reserve.
Former number one Martin Kaymer is second reserve, followed by the American Kevin Tway.
Following the announcement by former champion John Daly that the second player to withdraw from The Open within three days is that he will not participate after his request to use a buggy was rejected.
The 1995 winner used a buggy at the US PGA championship in May due to a knee problem.
After the R&A, he rejected his request last Saturday, the 53-year-old said he would have tried to "endure the pain," but had a change of heart ever since.
The Open returns to Portrush for the first time in 68 years from 18-21 July.