Name my spider

[geestring]

I've got this pet spider. He moved into my back yard about 2 months ago, then moved to the shed, now hes hanging out in my front doorway..

Anybody know what sorta spider he is? About the size of a 10c coin.
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how about marvin, catch flys for marvin and post pics of how big he/she getting. will be looking outfor them.