Lost cat, reward offered (El Cerrito Hills)

Our beloved cat Buddy has been missing since Saturday.
He’s a large tabby and very sweet and affectionate.
He usually sits in our backyard in the afternoons and always comes back in.
He’s never been outside overnight so we’re quite worried.
Thank you very much for anyone who can take a look for him.
He had a blue collar with white daisies on it which may have fallen off but he is micro chipped.
We are close to Tassajara Park.