《后汉书·列传·朱景王杜马刘傅坚马列》
建武九年，与雁门太守郭凉攻击卢芳将尹由于繁县，卢芳将领贾览率领胡骑万余人援救，杜茂与战，军败，引入楼烦县城。
九年，与雁门太守郭凉击卢芳将尹由于繁畤，芳将贾览率胡骑万余救之，茂战，军败，引入楼烦城。
In the ninth year of Jianwu, he attacked Yin You, the general of Lu Fang, at Fanxian with Guo Liang, the prefect of Yamen. Lu Fang's general Jia Lan led more than 10,000 Hu cavalry to rescue him. Du Mao fought with him and was defeated. He led him into Loufan County.