Gone are the days when the New York Yankees, Boston Red Sox and Philadelphia Phillies poached all the available talent leading up to baseball’s trade deadline.

Some of the biggest deals this year were made by small-market teams.

Michael Bourn, Ubaldo Jimenez and Ryan Ludwick were among the key players who changed clubs Sunday at the end of a topsy-turvy weekend, when the surprising Cleveland Indians, Pittsburgh Pirates and Arizona Diamondbacks made many of the boldest moves.

Long labeled as sellers in July, those cost-conscious squads instead went shopping for immediate help as they recognized a rare chance to make a postseason run.

Just 2Z\x games behind first-place Detroit in the AL Central, the Indians completed their Saturday night deal with Colorado for Jimenez about a half-hour before the 4 p.m. EDT deadline Sunday. Until then, they were waiting for results of the pitcher’s physical.

“This was a rare and unique opportunity, especially in our market, which comes along few and far between,” said Cleveland general manager Chris Antonetti, who also pulled off a deal Thursday to obtain outfielder Kosuke Fukudome from the Chicago Cubs.

Jimenez is under contract through 2013 at a team-friendly price. The right-hander was 19-8 with a 2.88 ERA last year, when he started the All-Star game, but he’s struggled this season. He is 6-9 with a 4.46 ERA in 21 starts, and his velocity has dipped.

“If we want to stay and maintain our competitiveness, with an opportunity to win every year, we had to be bold. It wasn’t a time to be timid,” Rockies general manager Dan O’Dowd said.

“As difficult as it might have been to pull the trigger, it would’ve been more difficult not to do it and put our franchise in a position of facing some type of major rebuilding process in the near future. This decision, if we were 10 games up and not 10 games back, still would’ve been a difficult deal to pass up.”

Cleveland paid a hefty price for Jimenez, who spent much of April on the disabled list. The Indians gave up minor league pitchers Alex White and Joe Gardner, first baseman Matt McBride and a player to be named, expected to be lefty Drew Pomeranz.

White and Pomeranz were considered the top two pitching prospects in the Indians’ organization.

“It was painful for us,” Antonetti said, “but we decided the time was right. We’re a better team than we were.”

Bourn went from the bottom of the NL Central in Houston to the top of the wild-card standings with Atlanta — and he wasn’t the only player who suddenly found himself in a pennant race Sunday.

Erik Bedard was shipped from Seattle to Boston, and Rafael Furcal went from the Los Angeles Dodgers to the St. Louis Cardinals. Last-place San Diego sent two players to postseason contenders, with Ludwick headed to Pittsburgh, and Mike Adams to Texas.

But all in all, it was a relatively quiet deadline day as the non-waiver cutoff came and went. Two of the biggest deals were completed days earlier when All-Star outfielders Carlos Beltran and Hunter Pence switched teams.

Notable names staying put after weeks of speculation: Padres closer Heath Bell, Tampa Bay outfielder B.J. Upton and Astros lefty Wandy Rodriguez.

In other deals Sunday:

n The Red Sox picked up Bedard after a deal for Oakland’s Rich Harden fell through late Saturday. Six prospects were involved in a three-team, seven-player swap that also involved the Dodgers.

n St. Louis acquired Furcal, a two-time All-Star shortstop, for Double-A outfielder Alex Castellanos.

n Texas bolstered its bullpen again with Adams, a day after adding Baltimore right-hander Koji Uehara. The Padres received a pair of minor league pitchers.