Haren is 7-7 with a 3.42 ERA in his first year with the Marlins. The three-time All-Star is a free agent at the end of the year.
Pineyro, 23, started 19 games at Double-A Tennesse this year, going 7-5 with a 3.69 ERA while fanning 92 over 107 1/3 innings. Pineyro sports a 1.248 WHIP in 419 2/3 innings over five Minor League seasons.
Soto, the Cubs' 15th-round pick in 2010 MLB Draft, hit .275 and scored 47 runs in 306 at-bats while playing mostly shortstop for Tennessee this season. The 25-year-old has a .632 OPS over five seasons in the Minors.
Joey Nowak is a reporter for MLB.com. Follow him on Twitter at @joeynowak. This story was not subject to the approval of Major League Baseball or its clubs.