![Boston Red Sox starter Daisuke Matsuzaka, of Japan, adjusts his cap on the mound against the Baltimore Orioles during the third inning of a baseball game Friday, Aug. 10, 2007, in Baltimore. ( Boston Red Sox starter Daisuke Matsuzaka, of Japan, adjusts his cap on the mound against the Baltimore Orioles during the third inning of a baseball game Friday, Aug. 10, 2007, in Baltimore. (](https://c8.alamy.com/comp/2PB890J/boston-red-sox-starter-daisuke-matsuzaka-of-japan-adjusts-his-cap-on-the-mound-against-the-baltimore-orioles-during-the-third-inning-of-a-baseball-game-friday-aug-10-2007-in-baltimore-ap-photonick-wass-2PB890J.jpg)
Boston Red Sox starter Daisuke Matsuzaka, of Japan, adjusts his cap on the mound against the Baltimore Orioles during the third inning of a baseball game Friday, Aug. 10, 2007, in Baltimore. (
Daisuke Matsuzaka, 40, to make comeback in NPB. Olympic comeback, too? - World Baseball Softball Confederation - wbsc.org
![Boston Red Sox starter Daisuke Matsuzaka, of Japan, adjusts his cap on the mound against the Baltimore Orioles during the third inning of a baseball game Friday, Aug. 10, 2007, in Baltimore. ( Boston Red Sox starter Daisuke Matsuzaka, of Japan, adjusts his cap on the mound against the Baltimore Orioles during the third inning of a baseball game Friday, Aug. 10, 2007, in Baltimore. (](https://l450v.alamy.com/450v/djg6jc/july-11-2010-toronto-ontario-canada-11-july-2010-red-sox-starter-daisuke-djg6jc.jpg)
Boston Red Sox starter Daisuke Matsuzaka, of Japan, adjusts his cap on the mound against the Baltimore Orioles during the third inning of a baseball game Friday, Aug. 10, 2007, in Baltimore. (
![Boston Red Sox pitcher Daisuke Matsuzaka, of Japan, looks at the ball during the first inning against the New York Yankees in a baseball game at Yankee Stadium in New York on Boston Red Sox pitcher Daisuke Matsuzaka, of Japan, looks at the ball during the first inning against the New York Yankees in a baseball game at Yankee Stadium in New York on](https://c8.alamy.com/comp/2NDPWED/boston-red-sox-pitcher-daisuke-matsuzaka-of-japan-looks-at-the-ball-during-the-first-inning-against-the-new-york-yankees-in-a-baseball-game-at-yankee-stadium-in-new-york-on-monday-may-17-2010-ap-photopeter-morgan-2NDPWED.jpg)
Boston Red Sox pitcher Daisuke Matsuzaka, of Japan, looks at the ball during the first inning against the New York Yankees in a baseball game at Yankee Stadium in New York on
![Boston Red Sox pitcher Daisuke Matsuzaka waits for a new ball after giving up a fifth-inning, two-run home run to Tampa Bay Devil Rays' B.J. Upton, rounding the bases in the background, Boston Red Sox pitcher Daisuke Matsuzaka waits for a new ball after giving up a fifth-inning, two-run home run to Tampa Bay Devil Rays' B.J. Upton, rounding the bases in the background,](https://c8.alamy.com/comp/2PB750A/boston-red-sox-pitcher-daisuke-matsuzaka-waits-for-a-new-ball-after-giving-up-a-fifth-inning-two-run-home-run-to-tampa-bay-devil-rays-bj-upton-rounding-the-bases-in-the-background-during-a-baseball-game-wednesday-aug-22-2007-in-st-petersburg-fla-ap-photomike-carlson-2PB750A.jpg)