Did President James Garfield appoint anyone to the US Supreme Court?

Yes. James Garfield appointed one justice to the US Supreme Court, former Ohio Senator Stanley Matthews. Matthews was originally nominated by President Rutherford B. Hayes in early 1881, but Matthews was a controversial candidate and the Senate declined to act on the nomination before Hayes left office in March.

Incoming President Garfield resubmitted Matthews name, and he was finally confirmed by a Senate vote of 24-23, the narrowest margin in the history of the Court. Justice Matthews served on the bench from May 1881 until his death in March 1889.