CHICAGO – The Chicago Cubs traded right-hander Andrew Cashner to the San Diego Padres for first baseman Anthony Rizzo — who played for the Portland Sea Dogs in 2010 — and minor league right-hander Zach Cates on Friday.

San Diego also received minor league outfielder Kyung-Min Na.

Cashner was slated to be the Cubs’ fifth starter last season but strained his shoulder in early April and made only seven appearances, including one start. He was Chicago’s first-round pick in 2008 and pitched in 60 games for the Cubs over two years, making one start.

Rizzo spent most of last season in Triple-A, and batted .141 with a homer and nine RBI in 49 games with the Padres over two stints.

He was acquired by San Diego as part of the deal that sent Adrian Gonzalez to the Red Sox.

CUBS: Chicago police are investigating an allegation that shortstop Starlin Castro sexually assaulted a woman last fall.

Castro, 21, hasn’t been charged with a crime and police otherwise declined comment.

“It’s an ongoing investigation,” Officer John Mirabelli said.

Castro was unavailable for comment but his lawyers said the allegation is false.

Cubs General Manager Jed Hoyer declined to discuss the allegation in any detail.

METS: Shortstop Ronny Cedeno agreed to a $1.15 million, one-year contract.

Cedeno, who turns 29 next month, hit .249 with two homers and 32 RBI last year for Pittsburgh. He figures to back up Ruben Tejada following the departure of Jose Reyes, who agreed to a $106 million, six-year deal with Miami.

CARDINALS: St. Louis retooled its staff while Dave Duncan takes a leave of absence that could lead to his retirement, elevating Derek Lilliquist to pitching coach and Dyar Miller to bullpen coach.

Lilliquist filled in as pitching coach when Duncan, 66, took a leave of absence last August to be with his wife, Jeanine, following surgery to remove a brain tumor. Duncan returned to the team for its run to a World Series championship but the Cardinals announced he would be taking another leave related to his wife’s recovery.

St. Louis didn’t say whether Duncan planned on returning for a 17th season.