An MRI exam Monday in New York showed no additional damage to the ligaments or tendons. An X-ray taken in Houston also was negative.
At the time of the injury, Beltran projected he would miss two or three games, and he is still on that timetable, which means he could play Tuesday or Wednesday.
Beltran is reporting increased flexibility, but he hasn't tested the knee by starting and stopping quickly.
REPLAY: One hit won't get it done, and that's all the Mets managed Monday night off Atlanta's Chuck James and Macay McBride in losing 5-0 at Shea Stadium. James threw eight strong innings, and McBride struck out the side in the ninth.
The Mets' lone hit was David Wright's single in the second. On Sunday, Mets pitchers gave up one hit in a 2-1 loss at Houston.
Right-hander Steve Trachsel issued seven walks in four innings, and his record fell to 14-6.
RHP Pedro Martinez, on the disabled list with a strained right calf muscle, is back working out with the team. He long-tossed Monday and could throw in the bullpen Wednesday. The Mets will continue to replace him in the rotation with LHP Dave Williams. Manager Willie Randolph hopes Martinez will return by the middle of the month and will be able to make three or four starts in preparation for the playoffs.
CF Carlos Beltran remains day-to-day with a bruised left knee sustained when he ran into the outfield wall in Houston on Saturday. A MRI exam Monday in New York was negative. Beltran's flexibility has improved, and he is hopeful of returning Tuesday or Wednesday.
LHP Dave Williams will be recalled from Triple-A Norfolk on Tuesday to make his fourth start of the season against Atlanta. Williams has pitched well enough to merit consideration for a rotation spot next year in spring training, but he is hopeful of sticking on the playoff roster as a reliever. "Whatever they want me to do," Williams said.
After Monday's game, the Mets announced that they plan to recall outfielder Lastings Milledge, left-hander Dave Williams and right-hander Brian Bannister from Triple-A Norfolk of the International League. In addition, the Mets will recall right-hander Philip Humber from Double-A Binghamton of the Eastern League.
The Mets will also purchase the contracts of catcher Kelly Stinnett and outfielder Ricky Ledee from Norfolk. The Mets will place right-hander Steve Schmoll (right hamstring) on the 60-day disabled list.
LF Cliff Floyd, who was reinstated from the disabled list Saturday and played the last two games of the Houston series, was scratched from Monday's starting lineup with soreness in his left Achilles tendon.
LHP Oliver Perez, 0-1 with a 13.50 ERA in two starts, will start Wednesday afternoon against Atlanta, with LHP Tom Glavine pushed back until Thursday.
BY THE NUMBERS: 3 -- Home runs needed by 1B Carlos Delgado, through Sept. 3, to tie him for 41st place on the all-time roster with Duke Snider at 407.
Center fielder Carlos Beltran remains day-to-day with a bruised left knee, sustained when he ran into to outfield wall Saturday night in Houston.
Carlos Beltran has only a bruise above his left kneecap and should return to the lineup shortly.
Carlos Beltran's catch Saturday was a game-saver.