Abu Ishaq al-Asbahani: There is no one on the face of the earth more trustworthy than Ziyad ibn Ayyub
Abu Bakr al-Bayhaqi: Trustworthy
Abu Hatim al-Razi: Truthful
Ahmad ibn Hanbal: Write from him, for he is a branch of the younger
Ahmad ibn Shuayb al-Nasa'i: There is nothing wrong with him, and once: Trustworthy
Ibn Hajar al-Asqalani: Trustworthy Hafez
al-Daraqutni: Trustworthy, reliable
al-Dhahabi: The Hafez
Abd al-Hayy ibn al-'Imad al-Hanbali: Trustworthy, Upright