Johnson wins St. Jude Classic

Dustin Johnson won the St. Jude Classic on Sunday June 10, in his second event after a back injury cost him nearly three months away from the PGA Tour, shooting a 4-under 66 that held off John Merrick by a stroke.

FedEx St. Jude Classic - Final Round

MEMPHIS, TN - JUNE 10: Dustin Johnson waves to the crowd after finishing on the 18th hole during the final round the FedEx St. Jude Classic at TPC Southwind on June 10, 2012 in Memphis, Tennessee. He won the tournament at 9 under par. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Final Round

MEMPHIS, TN - JUNE 10: Dustin Johnson lines up his birdie putt on the 18th hole during the final round the FedEx St. Jude Classic at TPC Southwind on June 10, 2012 in Memphis, Tennessee. He won the tournament at 9 under par. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Final Round

MEMPHIS, TN - JUNE 10: Rory McIlroy of Northern Ireland hits his second shot on the par 4 9th hole during the final round of the FedEx St. Jude Classic at TPC Southwind on June 10, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Final Round

MEMPHIS, TN - JUNE 10: John Merrick hits his tee shot on the par 4 2nd hole during the final round of the FedEx St. Jude Classic at TPC Southwind on June 10, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round Three

MEMPHIS, TN - JUNE 09: Rory McIlroy of Northern Ireland walks down the fairway on the par 4 10th hole during the third round of the FedEx St. Jude Classic at TPC Southwind on June 9, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round Two

MEMPHIS, TN - JUNE 08: Rory McIlroy of Northern Ireland hits his tee shot on the par 3 8th hole during the second round of the FedEx St. Jude Classic at TPC Southwind on June 8, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round Two

MEMPHIS, TN - JUNE 08: J.B. Holmes hits his tee shot on the par 4 5th hole during round two of the FedEx St. Jude Classic at TPC Southwind on June 8, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round Two

MEMPHIS, TN - JUNE 08: Padraig Harrington of Ireland hits his tee shot on the par 3 8th hole during the second round of the FedEx St. Jude Classic at TPC Southwind on June 8, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

Rory McIlroy, of Northern Ireland, watches his shot from the rough on the 17th hole at the St. Jude Classic golf tournament on Friday, June 8, 2012, in Memphis, Tenn. McIlroy finished the second round at 7-under-par 133. (AP Photo/Mark Humphrey)

Rory McIlroy, of Northern Ireland, watches his shot from the rough on the 17th hole at the St. Jude Classic golf tournament on Friday, June 8, 2012, in Memphis, Tenn. McIlroy finished the second round at 7-under-par 133. (AP Photo/Mark Humphrey)

Rory McIlroy, of Northern Ireland, hits from the sand on the 17th hole during the second round of the St. Jude Classic golf tournament on Friday, June 8, 2012, in Memphis, Tenn. McIlroy finished with a two-round score of 7-under-par 133. (AP Photo/Mark Humphrey)

FedEx St. Jude Classic - Round Two

MEMPHIS, TN - JUNE 08: Jeff Maggert hits his second shot on the par 4 17th hole during the second round of the FedEx St. Jude Classic at TPC Southwind on June 8, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round Two

MEMPHIS, TN - JUNE 08: Kevin Stadler hits his second shot on the par 4 15th hole during the second round of the FedEx St. Jude Classic at TPC Southwind on June 8, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round Two

MEMPHIS, TN - JUNE 08: John Merrick hits his second shot on the par 4 7th hole during the second round of the FedEx St. Jude Classic at TPC Southwind on June 8, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round One

MEMPHIS, TN - JUNE 07: Padraig Harrington of Ireland hits his third shot on the par 5 16th hole during the first round of the FedEx St. Jude Classic at TPC Southwind on June 7, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round One

MEMPHIS, TN - JUNE 07: Rory McIlroy of Northern Ireland hits his second shot on the par 5 16th hole during the first round of the FedEx St. Jude Classic at TPC Southwind on June 7, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round One

MEMPHIS, TN - JUNE 07: Rory McIlroy of Northern Ireland hits his tee shot on the par 5 16th hole during the first round of the FedEx St. Jude Classic at TPC Southwind on June 7, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round One

MEMPHIS, TN - JUNE 07: John Daly hits his second shot on the par 4 17th hole during the first round of the FedEx St. Jude Classic at TPC Southwind on June 7, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round One

MEMPHIS, TN - JUNE 07: Davis Love III hits his second shot on the par 4 9th hole during the first round of the FedEx St. Jude Classic at TPC Southwind on June 7, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round One

MEMPHIS, TN - JUNE 07: Rory McIlroy of Northern Ireland hits watches a shot on the par 4 13th hole during the first round of the FedEx St. Jude Classic at TPC Southwind on June 7, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round One

MEMPHIS, TN - JUNE 07: Seung-Yul Noh of South Korea hits his tee shot on the par 4 9th hole during the first round of the FedEx St. Jude Classic at TPC Southwind on June 7, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round One

MEMPHIS, TN - JUNE 07: Y.E. Yang of South Korea hits his tee shot on the par 3 8th hole during the first round of the FedEx St. Jude Classic at TPC Southwind on June 7, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round One

MEMPHIS, TN - JUNE 07: Nick O'Hern of Australia hits his second shot on the par 4 7th hole during the first round of the FedEx St. Jude Classic at TPC Southwind on June 7, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)

FedEx St. Jude Classic - Round One

MEMPHIS, TN - JUNE 07: J.J. Killeen hits his second shot on the par 4 1st hole during the first round of the FedEx St. Jude Classic at TPC Southwind on June 7, 2012 in Memphis, Tennessee. (Photo by Andy Lyons/Getty Images)