Question: Which actor, who stars in the 1926 silent film comedy directed by William A. Seiter, was an amateur boxing champion?

Context paragraphs:
Rolling Home (1926 film): Rolling Home is a 1926 silent film comedy directed by William A. Seiter and starring Reginald Denny.  It was produced and distributed by Universal Pictures.

Where Was I? (film): Where Was I?  is a 1925 silent film comedy directed by William A. Seiter and starring Reginald Denny.  It was produced and distributed by Universal Pictures under their Jewel banner.

Married ?: Married ?  is a 1926 silent film comedy directed by George Terwilliger and starring Owen Moore and Constance Bennett.  It was distributed by small silent studio Renown Pictures.

Reginald Denny (actor): Reginald Denny (born Reginald Leigh Dugmore, 20 November 1891 – 16 June 1967) was an English stage, film and television actor as well as an aviator and UAV pioneer.  He was once an amateur boxing champion of Great Britain.

Alan Richardson (boxer): Alan Richardson (born 4 November 1948 in Fitzwilliam) is an English amateur and professional featherweight boxer of the 1960s, and '70s, he was the 1969 Amateur Boxing Association of England featherweight boxing champion, won bronze medals in both the 1969 European Amateur Boxing Championships and the 1970 British Commonwealth Games, and was British professional featherweight boxing champion from Tuesday 15 March 1977 to Thursday 20 April 1978.

The Cheerful Fraud: The Cheerful Fraud is a 1927 silent film comedy directed by William A. Seiter and starring Reginald Denny and Gertrude Olmstead.  It was produced and distributed by Universal Pictures.

We're in the Navy Now: We're in the Navy Now is a 1926 silent film comedy directed by A. Edward Sutherland and starring Wallace Beery and Raymond Hatton.  Beery and Hatton previously appeared as a comedy team in Sutherland's "Behind the Front" and are reunited here.

The Man Upstairs (1926 film): The Man Upstairs is a lost 1926 silent film comedy directed by Roy Del Ruth and starring Monte Blue.  It was produced and distributed by Warner Brothers.  The film is based on a novel, "The Agony Column" by Earl Derr Biggers.

The Savage (1926 film): The Savage is a lost 1926 silent film comedy directed by Fred C. Newmeyer and starring Ben Lyon and May McAvoy.  The film was produced and distributed by First National Pictures.  Based on a short story by Ernest Pascal.

What Happened to Jones: What Happened to Jones is a 1926 silent film comedy directed by William A. Seiter and starring Reginald Denny.  It was produced and distributed by Universal Pictures.  The film is taken from an 1897 Broadway play, "What Happened to Jones" by George Broadhurst.

Supporting paragraphs: What Happened to Jones Reginald Denny (actor)
Answer: Reginald Denny