Bears do scratch vertical but I still dont think that is a bear. If it is, it may have issues with his paw as most markings I see you will always find at least 2-3 claw markings consistent with each other. These are sporadic and uneven so will vote something else.

P.S. Have also seen bears claw waste height as well, most fall into head height or above with others going from above head height to the ground. Then have found others that where all at the base of the tree, claw and dig marks there are for insects.