34-year-old Sadler was a league ever-present during his first spell with the Saddlers back in 2011/12, where he netted one goal in fifty-two appearances in all competitions.
And the experienced defender, who was a free agent following the end of his deal with near-rivals Shrewsbury Town, is keen to contribute just as much this time around.
Speaking via iFollow Walsall, Mat said; "I’m really happy to be back at Walsall. When I heard there was interest from the club, I wanted to park everything else to make sure the deal got done.
"I really enjoyed my time when I was last here. It was a challenging season but it was a season I thoroughly enjoyed. The current gaffer has the same sort of feel about him as Dean [Smith] when I was here last.
"Darrell has a real desire to improve and a real desire to set high standards. The manager has a certain aura about him and he wants to create something very, very special.
"I am hoping my experience is going to be shown both on the pitch and off it. I’m 34 but, even at this ripe old age, I am still very excited about the new season and I can’t wait to get going."
Speaking via iFollow Walsall, Mat said; "I’m really happy to be back at Walsall. When I heard there was interest from the club, I wanted to park everything else to make sure the deal got done.
"I really enjoyed my time when I was last here. It was a challenging season but it was a season I thoroughly enjoyed. The current gaffer has the same sort of feel about him as Dean [Smith] when I was here last.
"Darrell has a real desire to improve and a real desire to set high standards. The manager has a certain aura about him and he wants to create something very, very special.
"I am hoping my experience is going to be shown both on the pitch and off it. I’m 34 but, even at this ripe old age, I am still very excited about the new season and I can’t wait to get going."