New Delhi, July 2 -- The Boston Celtics have added frontcourt muscle and backcourt experience during the opening hours of NBA free agency. On July 1, center Mitchell Robinson agreed to a three-year, $47.4 million contract with a player option in the final season. Veteran guard Mike Conley also joined on a one-year deal, becoming the 14th player in league history to reach 20 NBA seasons.

These moves give Boston a proven rim protector coming off a title with the New York Knicks and a steady, respected leader at the point guard spot.

Mitchell Robinson spent eight seasons with the New York Knicks and played a key role in their first championship in 53 years. Across his time in New York, he averaged 7.5 points and 8.0 rebounds in roughly 24 ...