If the Cubs ultimately don't sign Bryce Harper or another big ticket free agent this winter and fans are wondering why, look no further than Rob Zastryzny.

It's not Zastryzny's fault, of course.

But he is the poster boy of sorts for the Cubs' issues in drafting and developing pitching that can make any sort of an impact at the big-league level.

Zastryzny has made at least 4 appearances over each of the last three seasons, racking up 34.2 innings to lead the way for the 147 pitchers drafted by Theo Epstein's front office over the last seven summers.

As a result, the Cubs have had to spend a lot of money to form their pitching staff over the last few years. That money adds up.

Kyle Hendricks and Carl Edwards Jr. — who spent time in the Cubs farm system, but were originally drafted and largely developed by the Texas Rangers — are the only two truly impactful pitchers that have come up through the minor leagues and still a big part of the current roster.

Where are the Josh Haders and Corbin Burnses and Josh Jameses and Walker Buehlers coming up through the Cubs system?

All four of those guys played major roles for their respective teams (Brewers, Astros, Dodgers) this fall.

Look, it's no secret to the Cubs they haven't developed a Hader-type weapon and they're disappointed about it, too.

"Candidly, those guys aren't found on the market very often," GM Jed Hoyer said last week. "Those guys are usually found internally. We haven't been able to develop that guy. Hopefully we will in the future. That guy makes a massive, massive impact."

Former Cubs draft picks accounted for 27 innings in the majors in 2018, and 1 of those innings came from Ian Happ (who is obviously not a pitcher). Of the remaining 26 innings, 5.1 came from Dillon Maples (who was drafted by Jim Hendry's front office in 2011).

That leaves 20.2 innings for a trio of draft picks — Duane Underwood Jr. (2012 selection) Zastryzny (2013) and James Norwood (2014).

The Cubs are projected to pay more than $130 million (with arbitration included) to only 12 pitchers in 2019 and they still figure to add at least another late-inning bullpen arm or two to that mix.

That obviously hampers what they want to do this winter in a free agent class loaded with potential impact bats that could make a huge difference for an underachieving lineup, though would come with a hefty price tag.

Last winter, Epstein's front office committed $185 million to a trio of free agent pitchers — Yu Darvish, Brandon Morrow, Tyler Chatwood — and all three guys were out of the team's picture by September either because of injury or ineffectiveness.

The contracts of those three guys are hanging over the 2019 squad and major questions follow each guy entering the new year.

But the Cubs are also in a tight spot financially because their homegrown position players are now starting to get exponentially more expensive.

"Of course we want more out of our homegrown pitching and I think we will have more as we go forward," Epstein said. "But we also built around bats. We built around homegrown bats and developing a nucleus that way knowing that in our minds, the right strategic move was to develop bats and then acquire pitching that's already good or about to become good or known commodities.

"If you look at our pitching track record, it's really good. Yeah, it's expensive. That's part of it."

The Cubs still have high hopes for young right-hander Adbert Alzolay, the top pitching prospect in their system who was shut down halfway through 2018 with a lat injury. But he's also only pitched 72.1 innings above A-ball in his career and will undoubtedly have an innings limit and other restrictions coming off the injury, so it's hard to count on him as a potential cost-effective part of the 2019 pitching staff.

The Cubs hope more pitchers are on the way along with Alzolay, but they don't know why the arms are lagging so far behind the bats.

"I think it's improving," Hoyer said. "I think our pitching depth is improving and hopefully that will start to bear fruit this year or next year. Overall, I think we've done an exceptional job of developing hitters.

"The pitching has lagged behind that. That's no secret. We're very accountable to that and we need to figure out why."