Career
He represented the United States in the 10,000 meters at the 1932 and 1936 Summer Olympics. Pentti placed second in the 10,000 meters at the 1932 United States Olympic Trials, qualifying for the 1932 Summer Olympics in Los Los Angeles At the Olympics he failed to finish, as did the two other Americans.
At the 1936 Olympic Trials Pentti placed second a hundred yards behind Don Lash, who set a new American record of 31:06.9.
He qualified for the 1936 Summer Olympics in Berlin, where he placed 16th. Pentti set his personal best for 10,000 meters, 30:54.6, in Helsinki on September 17, 1938.
The time broke Lash"s American best.
