Wily Mo Pena was the classic ‘tease’ power hitter for several MLB clubs. The Reds sold high on him – as he only hit 34 HRs and drove in 105 RBI in his 827 AB for 4 different clubs over 6 seasons after he left Ohio – before packing up for Japan. With Cincy, He hit for 51 HRs and drove in 134 RBI during his 830 AB with them. I would say that the Trade has worked out well for the Reds – in receiving a top of the Rotation Starter for almost a decade in exchange.  Wily Mo Pena was still the best Batting Practice hitter in the Majors.  Clubbing 84 HRs in 1703 Career AB is just a little over 1 HR per 20 AB.  Just not worthy of  a Pitcher like Arroyo.