Abu Ahmad ibn Adi al-Jurjani: He had a paternal uncle called: al-Hasan ibn Shuja', so he claimed his books, as his name matched his name. He narrated from a group of the people of Basra who died in the year thirty-something to forty-something, and from the people of Kufa as well.
Abu al-Hasan ibn Sufyan al-Kufi: More than one person narrated to me from al-Hadrami, that he said: He is a liar, and once: I saw many of our leading sheikhs criticizing him.
Abu al-Abbas ibn 'Uqda al-Kufi: He criticized him, and once said, God knows best about what they differed about.
Abu Bakr al-Isma'ili: We heard from him long ago, and at that time he was obscure, and his books were sound. But he ruined his own affairs in the end.
Abu Bakr al-Barqani: Al-Isma'ili had a good opinion of him, and when we heard from him, his condition was good. He was a forgetful narrator, so al-Khatib asked him, "Is he weak?" He said, "Yes, very weak."
Abu Dawud al-Sijistani: I do not narrate from Fadl ibn Sahl al-'Arraj, because he would not miss a good hadith.
Ahmad ibn al-Husayn al-Sufi al-Saghir: He was one of the calamities.
Al-Khatib al-Baghdadi: According to the Baghdadis, he is a forgetful narrator.
Al-Daraqutni: He is worth nothing because he narrated what he did not hear.
Abdullah ibn Zaydan al-Bajali: When it was mentioned to him that Ibn Sa'id criticized al-Hasan ibn al-Tayyib al-Shuja'i, he said, "What does the Balkhi have? I wrote a whole notebook about him." Ibn Sufyan said, and I think he said, "Trustworthy."
Ali ibn Umar al-Harbi: He had a good memory for his hadith.
Maslama ibn al-Qasim al-Andalusi: Trustworthy.
Muttin al-Hadrami: He criticized him the most and said, "He is a liar."