Earvin “Magic” Johnson is entering the bidding for the Denver Broncos, according to someone familiar with the move. The former NBA star has joined the bid group being led by Philadelphia 76ers co-owner Josh Harris, according to the person, who was granted anonymity because the details are private. Adding a high-profile African American investor, one of Johnson’s stature no less, could help make the group more attractive as bidding intensifies in the coming weeks and months.