Complex sentence: He was released by Walsall on 7 May 2014 but Roberts re--signed for the club on 22 July 2014 as cover for Richard O'Donnell and Craig MacGillivray.
Split into simpler sentences: He was released by Walsall on 7 May 2014. However, Roberts subsequently re--signed for the club on 22 July 2014 as cover for Richard O'Donnell and Craig MacGillivray.