Even after signing Burrell, the Rays remain interested in adding free- agent outfielder Gabe Kapler, who could enter their right-field mix and also play center if B.J. Upton is not fully recovered from shoulder surgery at the start of the season. The Burrell signing, however, stretched the Rays financially, and might restrict them from making further moves . . .Rosenthal. Kapler's FG page.