COLLEGE PARK, Md. — Resisting the urge to peek toward two big games at Madison Square Garden later this week, the Terrapins used a strong first-half finish to blow out Maine, 89-59, and move their record to 3-0 through the first week of the season. Jordan Williams continued his early domination, scoring 20 points and grabbing 11 rebounds for his third consecutive double-double to begin the season, and senior guard Cliff Tucker scored 16 points in the first half to pace a 23-6 run that put Maryland ahead by 23 points at intermission. Having played at Utah Valley on Friday night, the Black Bears were playing their second road game in less than 48 hours, committing 17 turnovers and shooting just 32.7 percent from the field in a sluggish performance against the athletic Terrapins. “The big thing today is that I thought we executed a little better in the half court, which we were looking for,” Gary Williams said. “But nobody is where they want to be Nov. 14th, you have to keep improving. If you can’t play in March, then it doesn’t matter.” The Terps’ performance from the free-throw line was an encouraging sign for the Terps in the