Timber Wolf was published by DC Comics from 1992-1993.
In the future, Brin's father wanted him to become a man quickly, so he pumped Brin full of chemicals. The chemicals hurt, but made Brin strong and swift, and allowed him to become a Legionnaire.
There Brin met Aria, who transported him one thousand years back to our time and turned him into Timber Wolf. Side effects of the time travel include an ever-raging anger that Timber Wolf struggles to contain, and an almost feral, wolf-like form.