Tosetti was a right-handed batsman who bowled right-arm medium pace. Tosetti made his first-class debut for Essex against Oxford University in 1898. He played first-class cricket for Essex from 1898 to 1905, making 41 appearances, the last of which came against Nottinghamshire in the 1905 County Championship.
In his 41 first-class appearances, Tosetti scored 1,054 runs at an average of 18.49, with a high score of 132 not out.
This score, which was his only first-class century, came against Lancashire in 1902. With the ball, he took 16 wickets at a bowling average of 55.68, with best figures of 3/67.