Lions start 1st voluntary minicamp under 1st-year coach Jim Caldwell without DT Ndamukong Suh

File- This Dec. 29, 2013, file photo shows Detroit Lions defensive tackle Ndamukong Suh walking on the field during the first half of an NFL football game against the Minnesota Vikings in Minneapolis. A person familiar with the situation says Suh is not attending the Detroit Lions' voluntary minicamp this week. The person, who says Suh will attend the team's voluntary workouts in May and mandatory minicamp next month, spoke Monday April 21, 2014, to The Associated Press on condition of anonymity because Suh was not announcing his plans. (AP Photo/Jim Mone, File) (The Associated Press)

The Detroit Lions have begun their first voluntary minicamp under first-year coach Jim Caldwell without Ndamukong Suh (ehn-DAHM'-uh-kehn soo).

The two-time All-Pro defensive end was not on the field with his teammates Tuesday afternoon during the 10-minute portion of the workout that was open for the media.

A person familiar with the situation told The Associated Press on Monday night that Suh will attend organized team activities in May and a mandatory minicamp the next month. The person spoke on condition of anonymity because Suh was not announcing his plans.

Suh is entering the last year of his contract.

Detroit cornerback Chris Houston and wide receiver Carlin Isles also were absent when the media had access to Tuesday's minicamp.