Indy Star 3-11-1912
DeRosier Seriously Hurt in Race at Los Angeles JAKE DEROSIER. 1,05 ANGELES, Cal., March 10.--Jake DeRosier, holder of many world's motorcycle motorcycle records, was badly Injured At Stadium saucer track today. In the second second heat of his match Mith Charles the latter's uheel slipped, DeRosier ran into it and both slid around the track 500 feet ^Itli locked wheels. DeRosler's left leg -was broken in three places. Rosior was seriously Injured hi the F. ^r rac^ at the Indianapolis Speedway two years ago.