Spurred on by his fans, he won the next three games easily.

spurred 是动词 spur 的过去分词形式。spur 原指"马刺"，用作动词时表示"用马刺踢马使其前进"，引申为"激励、鼓舞"的意思。这里用过去分词形式表示被动含义，指"被粉丝们激励"。