The Bears have traded tight end Greg Olsen to the Panthers in exchange for a third-round pick in the 2012 draft, according to a league source. Olsen then agreed to a four-year, $24 million extension with $10 million guaranteed, added a source. "I think it's bittersweet," Olsen said. "I've made it clear since the day I got here that I've really enjoyed my time here in Chicago. My plans all along, obviously, were to play my career here. ... The guys on the team have been awesome. And the fans obviously are second to none and this city really embraces their team. ... At the same time, I feel like for my career and going forward to go join a team that has so much promise and the guys they have in place already down there. And [offensive coordinator] Rob Chudzinski [is] a guy that I know from my college days. And what he's done with tight ends and how his offense focused around that position. So I feel like it's a great opportunity for me going forward and it's something I'm looking forward to."