He relieved starting pitcher Eddie Lopat in the fifth inning of the second game of a twinight doubleheader on September 23 at Griffith Stadium against the Washington Senators.
Harrison hurled two innings and surrendered four bases on balls, two hits and two earned runs in a 7–3 Oriole defeat.
Recalled by the Orioles again, he started on September 26, 1956, at Memorial Stadium against the eventual world champion New York Yankees.
However, Harrison was not charged with the 11–6 Baltimore defeat, as Hal Brown, who relieved him in the second inning, gave up the winning run.
[2] Altogether Harrison appeared in two MLB games, pitched in 3⅔ innings, and gave up five earned runs, six hits, and five bases on balls.