Complex sentence: Cannon entered the 2016 Patriots training camp in what he called "the best shape of his life" and after struggling the previous season while dealing with the toe injury, his play improved significantly during the 2016 season.
Split into simpler sentences: Cannon entered the 2016 Patriots training camp in what he called "the best shape of his life". After struggling the previous season while dealing with the toe injury, his play improved significantly during the 2016 season.