A bit of advice when dealing with herps...
Most people who give unsolicited advice, don't know what the heck they are talking about!
There is no way to identify the frog from those photos (it would help if you cropped the picture down to only the frog)
The best way to tell the difference between bullfrogs and most others, is by the dorsolateral fold. This is a ridge that runs behind the eye down to the groin. Check out the web site below, there is only one bullfrog picture and you can clearly see that there is no dorsolateral fold, while the pictures of all the others have that distinctive ridge. In this does not do it for you, I strongly recommend getting a Peterson field guide, it contains illustrations that makes identification very easy.
Link
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...the oldest task in human history: to live on a piece of land without spoiling it."
Aldo Leopold (1938)
"Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us."
Calvin and Hobbes (Scientific Progress Goes 'Boink', 1991)