Sampson's fourth great grandfather was Robert Seaver, as:

Robert Seaver (1608-1683) m Elizabeth Ballard in 1634
Shubael Seaver (1639-1729) m Hannah Wilson in 1667
Joseph Seaver (1672-1754) m Mary Reed in 1701
Nathaniel Seaver (1709-1777) m Judith Treadway in 1753
Elijah Seaver (1739-?) m Bethiah Hosley in 1767
Nathaniel Seaver (1781-1834) m Lydia Hosley bef 1815
Sampson Seaver (1830 - ?) m Polly Stewart in 1857 (the editor's 4th cousin 3 times removed)

(the above from: http://www.werelate.org/wiki/Person:Sampson_Seaver_(1))

Robert Seaver above (1608-1683) is the 9th great grandfather of Hall of Fame pitcher Tom Seaver:

Robert Seaver (1608-1683) m Elizabeth Ballard in 1634
Joshua Seaver (1641-1730) m Mary May
Joshua Seaver (1679-1739) m Mercy Cooke
William Seaver (1721-1782) m Patience Trescott
William Seaver (1743-1815) m Rebecca Hunt
William Seaver (1763-1828) m Mary Everett
William Seaver 1789-1871) m Naomi McCleary
James Everett Seaver (1821-1855) m Nancy K. Follett
James Everett Seaver (1851 - ?) m Bella R. Carr
Everett Herbert Seaver (1886-1963) m Gertrude Sharp
Charles Henry Seaver (1911-2004) m Betty Lee Cline)
George Thomas ("Tom") Seaver (1944 - ?) m Nancy Lynn McIntyre

(the above from: http://www.geneamusings.com/2006/05/yes-tom-seaver-is-my-10th-cousin.html)

Thus, Tom Seaver is the 5th cousin 5 times removed of Sampson Seaver. Since Sampson's wife, Polly Stewart, is my 4th cousin 3 times removed; Tom Seaver is the 5th cousin 5 times removed of the editor's 4th cousin 3 times removed.