Morton was ahead of Chicago Mt. Carmel in two of the four quarters Dec. 28.
But the Caravan's 17-3 domination in the second period lifted Mt. Carmel to a 45-32 win over the Potters in the quarterfinals of the Pekin Insurance Holiday Tournament.
Isaac Stephens, on 3-of-4 field-goal shooting, and David Rossi paced Morton with seven points.
The Potters were tied after one quarter, but the 17-3 shortfall in the second left them with a 25-11 halftime deficit.
Corey Dullard and Jake Morsch tallied five points apiece for Morton. Brent Waibel was the top rebounder with six.
The Caravan were guided by Chris Searles' 18 points.
MHS 45, Plainfield East 36
The Potters knocked off the defending tournament champion in the Dec. 28 nightcap.
Dullard registered a game-high 17 points to lead Morton to its second tournament victory.
Morsch joined Dullard in double figures with 12 points, which included 2-of-2 shooting from 3-point range.
Rossi, who had six points, distributed four assists.
Waibel had seven rebounds, and Stephens added six boards and five points in 13 minutes.
The Potters tied or outscored the Bengals in every quarter.
Plainfield East was led by Nick Novak's 11 points.
Morton limited eventual all-tournament pick Aaron Jordan to four points.
Richwoods 44, MHS 35
The Knights outscored the Potters 13-4 in the third quarter Dec. 29 to attain a win in the fifth-place game.
Morton (3-11) was led by Dullard's game-leading 14 points. The junior was 3-of-6 from long range.
Rossi provided 10 points and a game-best seven rebounds.
Waibel recorded six rebounds and a couple steals.
Denzel Irving had 11 points for the Knights, who were in front only 16-15 at halftime.
Another Pekin all-tournament selection, Richwoods' Preston Wells, mustered just one point against the Potters.
Unseeded Springfield Lanphier claimed the tournament championship, 76-60, over Pekin.
The four Mid-Illini Conference teams entered went a collective 10-6.
Morton now is 69-59 in 35 all-time appearances at Pekin.
League play resumes: The Potters play their first M-I game in three weeks when they go to Canton's Alice Ingersoll Gymnasium Friday.
Prior to facing the Little Giants, Morton went to Notre Dame Tuesday.