The Orlando Magic may be short-handed for Tuesday night’s clash with the Detroit Pistons because of injuries.Center Dwight Howard and guard Jameer Nelson are questionable, while forward Ryan Anderson is listed as doubtful for the contest.Howard sat out Sunday’s 104-101 home loss to Denver with back spasms. Coach Stan Van Gundy believes the injury is the result of a punch in the back by Dallas’ Brendan Haywood during Friday’s 100-98 home defeat.Nelson is dealing with a sore left calf and Anderson is doubtful after sustaining a right ankle injury in Sunday’s final minutes.Orlando will try to avoid a season-high tying fourth consecutive loss.