The Detroit Lions and run-stuffing defensive tackle Roy Lopez have agreed to a $4.65 million, one-year contract, according to a person familiar with the deal. Lopez gives Detroit’s defense another tackle with four years of experience, joining veterans Alim McNeill and DJ Reader, to bolster a line that was hit hard by injuries last season. The 27-year-old Lopez started in 16 games last year with the Arizona Cardinals and played in 30 games for them after starting in 19 games over two seasons in Houston.