The Cubs contended for a while in 1977 and so it was thought a few deals might improve the team. They also made their first (and only, under the Wrigley ownership) major free-agent signing by inking Dave Kingman to a three-year deal.
The trades, though... yikes.
March 29: Acquired Rodney Scott from the Athletics for Pete Broberg
Broberg, acquired in ‘77, did little for the Cubs. The Cubs sent Scott to Triple-A, where he stole 36 bases in 63 games. Called up in late June, he started all over the field, but mostly at third base (48 games).