Tom Brady tackling mechanics alone with mentor gone ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Charles Krupa/AP Eric Kettani took his turn hitting a blocking sled during one of the Patriots minicamp workouts this week. Charles Krupa/AP Tom Brady has been at the center of the practices as he heads into his 13th season with the Patriots. Jonathan Wiggs/Globe Staff Julian Edelman went low for this catch in the minicamp, which is the one mandatory offseason session for players. Charles Krupa/AP Patriots coach Bill Belichick, right, welcomed ex-Cardinals manager Tony LaRussa, center, and Bulls coach Tom Thibodeau to practice. Robert E. Klein for The Boston Globe Defensive back Devin McCourty, left, needed a water break. Jonathan Wiggs/Globe Staff New Patriots receiver Brandon Lloyd went to his knees for this catch. Robert E. Klein for The Boston Globe Defensive back Ras-I Dowling, who spent much of last year on injured reserve, participated in the drills. Jonathan Wiggs/Globe Staff Tom Brady tried to get acquainted with a bevy of new receivers during the workouts. Robert E. Klein for The Boston Globe Rookie defensive back Alfonzo Dennard, left, ran with veteran Devin McCourty. Charles Krupa/AP Defensive lineman Jamie Richard, left, slammed a blocking pad into offensive lineman Dan Koppen. Robert E. Klein for The Boston Globe Tom Brady, as usual, drew a large contingent of reporters when he answered questions. Jonathan Wiggs/Globe Staff Bill Belichick oversaw a minicamp that will precede his 13th season as Patriots coach.