Oakland Raiders quarterback Terrelle Pryor (2) runs for a 93-yard touchdown past Pittsburgh Steelers free safety Ryan Clark, left, inside linebacker Vince Williams (98) and cornerback William Gay (22) during the first quarter of an NFL football game in Oakland, Calif., Sunday, Oct. 27, 2013. (AP Photo/Marcio Jose Sanchez) by Will GravesAP Sports Writer PITTSBURGH (AP) – Two weeks of momentum vanished in 19 seconds. More than three hours later, the competitive portion of the Pittsburgh Steelers’ season likely followed suit. Stung on the first play from scrimmage and stumbling on the last, Pittsburgh’s 21-18 loss to the Oakland Raiders thwarted any progress the Steelers (2-5) made during a brief two-game winning streak that suggested perhaps there was a chance they could somehow dig out of an 0-4 start. Turns out, probably not. The same mistakes that dogged Pittsburgh during a winless September re-emerged in the Black Hole.