All SPB 60 -1951 Managers,  Here is the report on under used players for the 
just completed 1951 season:

Asbury Park Titans (Al Schweitzer)
Les Moss, c (1952)
Bert Haas, 1b *
Jimmy Bloodworth, 2b *
Tod Davis, 2b *
Dick Young, 2b (1952)
Dino Restelli, of *

East Kenosha Lakers (Dave Lauer)
Clarence Maddern, of *
Jim Russell, of *

Frankfort Frigates (Gary Plunkitt)
Dan Porter, of *

Joliet Jakes (Terry Baxter)
Dixie Howell, c (1952)
Mickey Owen, c (1954)**
Hank Schenz, inf *
Frank Saucier, of *
Al Widmar, p (1952)
Hank Borowy, p *
Milo Candini, p *

Louisiana Lightning (Mike See)
Al Zarilla, of (1952)
Chris Van Cuyk (1952)

Massilon Tigers (John Ungashick)
Gordy Goldsberry, 1b (1952)
Gene Verble, ss (1953) **
Eddie Erautt, p (1953) **

Mound City Saints (Rich Applegate)
Bill Jennings, ss *

New Bedford Ahabs (Chris Williams)
Joe Erautt, c *
Ray Mueller, c *
Thurman Tucker, of *

Newark Bears (Joe DeZarlo)
Milt Nielsen, of *

Raleigh Tarheels (Steve Lehman)
Johnny Vander Meer, p *
Bob Muncrief, p *
Harry Taylor, p (1952)

Riverside Robbers (John Turnbull)
Lou Limmer, 1b (1954) **
Virgil Stallcup, ss (1952)
Don Thompson, of (1953) **
Peanuts Lehner, of (1952)
Bill Evans, p *

* never plays in MLB again.
**  comes back in rookie draft of year listed

And the following teams had no players underused in 1951:
Schenectady Patriots (Don Rahn)
St. Clar Shores Mariners (Vin Onstott)
Wabash Six (Bill Lanke)

This concludes the 1951 Use Em/Loose Em Report.