The Cubs aren’t letting a holiday malaise or slow-moving market stop their pursuit of pitching. After signing four pitchers in the past nine days, the Cubs have eyes on landing a bigger catch: free-agent right-hander Yu Darvish. The Cubs are showing interest in Darvish, a source said. Darvish and Jake Arrieta are considered the top starters available in free agency, and Darvish’s camp has also had talks with the Twins and Astros lately. The 31-year-old Darvish was 10-12 with a 3.86 ERA and 1.16 WHIP for the Rangers and Dodgers in 2017, when he was dealt to Los Angeles at the deadline. He had a 10.1 strikeout-per-nine-innings rate and a 2.8 walks-per-nine-innings rate. Darvish has a career 3.42 ERA. Some concern remains from Darvish’s performance at the end of the season, as the Astros crushed him twice in the World Series.