Detroit Tigers merchandise is selling briskly after adding high-profile first baseman Prince Fielder to a roster that already includes American League Cy Young winner and Most Valuable Player Justin Verlander. The Tigers' slice of the business has grown 27 percent for the first three months of the year, compared with the same time last year, SportsOneSource LLC analyst Matt Powell said. Since signing free-agent Fielder to a nine-year, $214-million contract in January, the Tigers have become Major League Baseball's ninth best-selling team in sales this year through March 28, according to SportsOneSource, a Charlotte, N.C., sporting goods consulting firm. Detroit was No. 11 at the same time last year.