"I missed too many free throws," Parker, whose team narrowly lost to Mouth of Wilson (Va.) Oak Hill on Thursday night, told Scout.com.
Despite his team losing, Parker was the most dominant prospect in the game. He cites his recent improvement to getting in shape.
"I've lost 20 pounds since NBA camp," Parker said.
"I think I've improved a whole lot," he added. "I'm being more patient on my moves and that's helped me a lot and I'm running the floor and rebounding."
As he's gotten older, Parker has matured, both on and off the court and that's one of the reasons we are seeing such a dominant post prospect right now.
"I think I've just picked up my play," Parker said. "It just means a lot more to me. When I'm in shape I'm a better basketball player. In the summer time I seem to get out of shape, but during school I'm able to get with my trainer."
Parker said he's also spent a considerable amount of time working on his low post and counter moves.
"My moves have gotten better," Parker said. "I work on a lot of stuff and a lot of jump shots and step backs and stuff like that. I've pretty much always had a power game, but I've added things to it.
"It's going pretty well," he said of the process. "I'm just really watching the schools play a lot."
"Kansas has really come into the picture a lot more," Parker added. "They are looking at me hard. My last official might be to Kansas depending on my parents."
Despite Kansas coming in late, Parker said he's serious about his interest in the Jayhawks.
"I'm definitely serious about Kansas because what they do with their bigs is outstanding," Parker said. "What they do with Thomas Robinson and the way he uses his body and gets position, whoever is teaching him is doing a great job.
"They did a great job with the Morris twins and their track record is really good. That's one of the big things about the schools and I want a really good strength conditioning coach. Those things make sense."
Parker also made it clear that Ohio State is major factor in his recruitment as well. He cited the way they play in general, but also how they use Jared Sullinger as reasons he likes the Buckeyes.
"I just like Ohio State period," he said. "They just play with such a persona and hardnosed basketball. I think those guys do a really good job playing defense. They have really good guard play. They are fast and different and those guys play hard and Thad Matta does a really god job with bigs."
Parker singled out Ohio State and Kansas and said the two particularly do a great job with their post prospects.
"You know what you're going to get from OSU and Kansas," he said. "You know you're going to get a hardnosed game from them and they are going to established their bigs early in the game."
"Those schools really do establish their posts and have really good guys that work with them. Danny Manning and Chris Jent are really good with post players."
UCLA is a school pushing for Parker as well. In fact, Parker not only has the UCLA coaching staff after him, but his close friends as well.
"Jordan Adams is really pushing it," he said. "When I'm at the free throw line [last night] he's saying UCLA. Kyle [Anderson] is always hitting me up and Kyle's dad is a big recruiter too. I've been knowing those guys since I was a little. I played against [Kyle] in 7th grade and 8th grade nationals."
Does Parker listen to them?
"I listen to them," he said. "Because there's a reason they are going there. I listen to them."
Parker has also taken official visits to Duke. He said he's been paying attention to Duke and how they use their big men.
"They are doing a really good job right now," he said. "Outside of the game against OSU they've been doing pretty well. They are establishing post play right now."
Memphis, who had a coach at his game last night, is selling Parker on early playing time and the lack of a true scoring post player.
"I'm just talking to the coaching staff and they are trying build Memphis basketball up to when Calipari was there. They are doing a pretty good job right now."
"They just need a post presence that can really score. They are probably going to find their groove late in the season. Moving Chris to the point was a good. He's really stepped up his game."
Parker is ranked No. 19 overall in the 2012 recruiting class.