Woods is a five-time champion at this event, most recently in 2012, and is making his first start since a T-69 finish at The Players Championship. He'll play the first two rounds alongside Day, who lives in the Columbus area and is a member at Muirfield Village, and Reed, with whom Woods played the first two rounds at TPC Scottsdale earlier this year.
Spieth enters off a T-30 finish in his hometown event, and will be playing his third straight event and fifth tournament in the last six weeks. Spieth will be joined by Rose, who earned his first PGA Tour victory at this event in 2010, and Haas, who has finished inside the top 10 each of the past two years at Muirfield Village.
Johnson contended deep into the final round at last week's event in Texas, and now he will be grouped with a pair of past Memorial champions. Kuchar won this event in 2013 and boasts a record of seven straight top-15 finishes at this event, while Stricker won this event in 2011 and followed up with a T-6 finish last year.
Fowler and Mickelson, frequent partners in Tuesday money games, find themselves grouped together for the first 36 holes this week. Fowler will be making his first start in the U.S. since his dramatic win at TPC Sawgrass, while Mickelson looks to finally add this event to his trophy collection. They'll be joined by the defending champ in Matsuyama, who defeated Kevin Na in a playoff last year.