The Detroit Tigers Friday designated closer Jose Valverde for assignment. Valverde appeared in 20 games, saving nine but blowing three saves. His earned run average is 5.59. Valverde probably will be outright released next week. The Tigers also placed outfielder Matt Tuiasasopo on the disabled list and recalled Avisail Garcia from Toledo. The Tigers, 40-31, host Boston in game two of their four game series Friday night.