Here are Bass' per 36 minute stats from basketball reference, this year and last year:
11-12: Points = 14.2, O-Reb = 1.8, D-Reb = 5.2, Asst = 1.1, Blck = 1.0, Stl = 0.7, TrnOvr = 1.3, Fouls = 2.6
12-13: Points = 11.3, O-Reb = 2.2, D-Reb = 4.9, Asst = 1.0, Blck = 1.0, Stl = 0.7, TrnOvr = 1.1, Fouls = 3.6
So he is basically the same player, scoring less and fouling a lot more.
His points are the lowest he's had in 5 years, and his PER is also at its lowest in 5 years.
He is definitely playing poorly.