Bell will oversee the player development and physical and mental performance departments, while also contributing to strategic planning and player evaluations and acquisitions.
Graterol pitched in seven games during the regular season and three in the World Series against the New York Yankees, which the Dodgers won in five games. He allowed three hits over 2 1/3 scoreless innings in those World Series appearances.
Jalen Leach scored a season-high 27 points and Nick Martinelli added 16 points and Northwestern needed overtime to beat Eastern Illinois 67-58 on Friday night.
Ace Baldwin Jr. and Zach Hicks scored 19 points apiece and Penn State rolled to an 86-64 victory over Virginia Tech at the Hall of Fame Series on Friday night.
Freshman C.J. Cox scored nine of his 11 points during a game-turning 13-0 run in the second half to help No. 13 Purdue get past No. 2 Alabama 87-78 on Friday night.