pˈiːnə mˌeɪd sˈɛvənti fˈaɪv plˈeɪt ɐpˈɪɹənsᵻz ɪn fˈoːɹɾi sˈɪks ɡˈeɪmz θɹuː ðə lˈæst fˈoːɹ mˈʌnθs ʌvðə tˈuː θˈaʊzənd ˈeɪt sˈiːzən ænd wʌz dˈɛzɪɡnˌeɪɾᵻd fɔːɹ ɐsˈaɪnmənt baɪ ðə kˈænzəs sˈɪɾi ɹˈɔɪəlz ˌɔn dʒuːlˈaɪ sˈɪkstiːn, tˈuː θˈaʊzənd nˈaɪn.
Pena made 75 plate appearances in 46 games through the last four months of the 2008 season and was designated for assignment by the Kansas City Royals on July 16, 2009.