The Atlanta Hawks are reluctant to offer unrestricted free agent Al Horford a fifth year on a potential contract, and are at grave risk of losing him this offseason, ESPN's Zach Lowe reports, citing league sources.

Atlanta is the only team that can offer a fifth year, and will undoubtedly lose a fair amount of leverage if it remains hesitant to give the 6-foot-10 center the extra money.

Should Horford walk, he is expected to have a number of suitors. The Washington Wizards, Houston Rockets, Golden State Warriors, Detroit Pistons, Los Angeles Lakers, and Orlando Magic have all been linked to the 30-year-old.

In 82 games this past season, Horford averaged 15.2 points, 7.3 rebounds, 3.2 assists, 1.5 blocks, and 0.8 steals on 50.5 percent shooting.