George Kottaras with his dog Leo during Cubs photo day in 2014.
2 of 56Scott Halleran/Getty Images
LPGA standout Paula Creamer poses with Studley at her home in Windermere, Fla.
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4 of 56Jonathan Ferrey/Getty Images
Michelle Wie with her Pomeranian, Lola at the Industry Hills Golf Club in California.
5 of 56Peter Read Miller/SI
Four-time Olympic gold medalist Greg Louganis with his dogs, Dobby and Hedwig at his home in Los Angeles.
6 of 56Deanne Fitzmaurice/SI
Jack Jablonski with man's best friend days after a hockey injury changed his life.
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Kyle Busch and his wife, Samantha Sarcinella, celebrate with their dogs in Victory Lane after winning the a Nationwide Series race at Darlington in 2011.
8 of 56Jim McIsaac/Getty Images
Manny Acosta says goodbye to his dog before boarding the team bus for a road trip from New York to Toronto.
9 of 56Doug Pensinger/Getty Images
Lindsey Jacobellis, accompanied by her dog Gidget, talks with Luke Mitrani after he finished third in the FIS Snowboard Halfpipe World Cup in Park City, Utah.
10 of 56Courtesy of @TimTebow
Tim Tebow with his Rhodesian Ridgeback.
11 of 56REUTERS/Brian Snyder
In this photo, David Ortiz kisses his dog Mikey following conditioning drills at the team's spring training facility in Fort Myers, Fla.
12 of 56ZUMApress.com
Rays pitcher David Price plays with his dog Astro before a home game against Seattle.
13 of 56Doug Pensinger/Getty Images
Ben Roethlisberger's dog licks his face at his Pittsburgh home.
14 of 56David Cone/SI
Maurice Jones-Drew and his dog Phillip strike a pose during an SI photo shoot.
15 of 56Courtesy of @PierreDjoko
Novak Djokovic's poodle, Pierre, made headlines in 2011 when Wimbledon officials banned Pierre from the All England Club. Pierre, who like Andy Murray's dog Maggie May also has his own Twitter account, is a regular member of the No. 1 ranked tennis player's travel crew.
16 of 56Nick Laham/Getty Images
Dario Franchitti and Ashley Judd
Dario Franchitti poses with Ashley Judd and their dogs after winning the 2012 Indianapolis 500.
17 of 56REUTERS/Erik de Castro
Manny Pacquiao's pet dog "PacMan" jumps on him as he rests from his morning training in the northern Philippine resort city of Baguio.
18 of 56Brian Bahr/Getty Images
Carmelo Anthony and pup.
19 of 56Peter Gregoire/SI
Before he was a Super Bowl-winning quarterback, Drew Brees would hit the books at Purdue with man's best friend.
20 of 56Walter Iooss Jr./SI
Serena Williams and her dog only travel first class.
21 of 56Jonathan Daniel/Getty Images
Frank Thomas pets his dogs Bubba and Barbie during the "Dog Day" promotion at Comiskey Park.
22 of 56Rusty Jarrett/Getty Images
Greg Biffle and his dog Foster appear at a press conference to launch the NASCAR Pets calendar.
23 of 56Bill Frakes/SI
Dan Marino and his dog enjoy some time by the pool.
24 of 56George Tiedemann/SI
Tony Stewart makes sure to keep his dog close during an SI photo shoot in his hometown of Columbus, Ind.
25 of 56Robert Beck/SI
San Francisco 49ers tight end Vernon Davis with his dog during an SI photo shoot in San Francisco.
26 of 56James Schnepf/SI
Ben Sheets poses with his wife Julie and dog Bruiser.
27 of 56Steve Wewerka/SI
Matt Birk and his dog Jake get in a workout at Birk's gym in St. Paul, Minn.
28 of 56Joey Terrill/SI
Mark Calcavecchia spends time at home with his children Eric and Britney and the family dog, D.J.
29 of 56Lynn Johnson/SI
Joe Torre plays in his backyard with his 11-month-old daughter Andrea and the family dog.
30 of 56Bill Frakes/SI
Mike Alstott and his dog get ready for some fishing.
31 of 56Rafael Fuchs/SI
Lenny Dykstra, his wife and their two sons hang out in the family's backyard while the family dog tries to stay out of mischief.
32 of 56Jeffrey Lowe/SI
Todd Helton and his dog pose together for a SI photo shoot outside Coors Field.
33 of 562008
Pat Burrell and his dog Elvis arrive at a victory rally celebrating the Phillies' World Series victory at Citizens Bank Park.
34 of 56Ryan Pierse/Getty Images
Venus Williams and her dog leave the press conference during previews for a WTA event in Rome.
35 of 56Michael J. LeBrecht II/1Deuce3 Photography
Miles Austin spends quality time with his family and the Austin family dog at their New Jersey home.
36 of 56Bill Frakes/SI
Charles Woodson and his dog enjoy a leisurely afternoon at Woodson's house in Oakland.
37 of 56AP
O. J. Mayo
O.J. Myao and his dog, Bum, hang out at their Memphis house.
38 of 56Corbis Images
Craig Biggio gets his face licked as he looks out the window of his living room.
39 of 56Mike Powell/Getty Images
Downhill skier Picabo Street washes her dog Dougan at an Aquadog in Portland, Ore.
40 of 56Walter G. Arce/ASP/Cal Sport Med
Jamie McMurray poses with his dog, Jake, at the Richmond International Raceway.
41 of 56Bob Martin/SI
Martina Hingis and her dog enjoy the snowy weather.
42 of 56Neil Leifer/SI
Sparky Lyle and his puppy pose for this August 1972 cover.
43 of 56DAVID LIAM KYLE/SI
Kordell Stewart and his dog strike a pose during a 1995 photo shoot.
44 of 56Matthew Stockman/Getty Images
Martina Navratilova poses with one of her many dogs during the Family Circle Cup in Charleston, S.C.
45 of 56John Biever/SI
Christian Laettner and Chief relax by the fireplace at the forward's Minneapolis home.
46 of 562008
Phil Jackson and Jeanie Buss
Phil Jackson, Jeanie Buss and their dog arrive at the 100th episode celebration for the "Dog Whisperer" With Cesar Millan. The three appeared on the show in 2008.
47 of 56Bill Frakes/SI
Nate Newton builds a doghouse for his pit bull.
48 of 56Ben Van Hook/SI
Vijay Singh and his dog take time out for a quick photo during a tour event in Ponte Vedra, Fla.
49 of 56WERNER GATTINGER/SI
Sam Snead and Buddy pose while sitting in a golf cart.
50 of 56AP
Sammy Baugh pets his dog Cow Patty at his West Texas ranch near Rotan, Texas.
51 of 56Art Rickerby//Time Life Pictures/Getty Images
Wilt Chamberlain jogs on a California beach with his dog.
52 of 56Bill Frakes/SI
Hall of Famer Ted Williams plays with his dog at their home in Hernando, Fla.
53 of 56AP
Willie Mays is comforted by his wife Marguerite and dog Pope after catching a virus during spring training in 1957.
54 of 56David Strick/SI
Chris Mullin gives a bath to his dog, Kuma.
55 of 56Joe McNally/Getty Images
Ivan Lendl is photographed at his mansion in Greenwich, Conn., with his German Shepherd Viky
56 of 56AP
Doug Flynn and Joel Youngblood
New York Mets teammates Doug Flynn (left) and Joel Youngblood play with their dogs during spring training in St. Petersburg Beach, Fla.
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