This park is immediately adjacent to another city park, Columbus Square Park. I did a profile of that park back in August, 2013. Read all about it here.
The city website spells his name wrong and hence the google maps pin is wrong as well. The name is spelled Filipiak not Filipiac. Surely an honest mistake.
It is fitting to re-post some of the information about Fr. Filipiak from that previous post as he was the one person who saved the church from the Archdioscese wrecking ball (a mighty and still active wrecking ball indeed):
In 1979, the Rev. Edward Filipiak was a one-man pastorate on a mission to save his church, built in 1844, from demolition. Archdiocese leaders planned a new building nearby but backed off after some former parishioners organized the Friends of St. Joseph, and the National Register of Historic Places designated the twin-spire structure a landmark. (source)
Photo by Ted Dargen of the Post-Dispatch
What you'll see at this park is a grassy knoll of rolling berms and a few shade trees complete with benches and plaques in honor of Fr. Filipiak and those who've lost their lives in the line of work.
bench repairs needed
Edward Jones Dome and Arch in the background
There is a nice line of knockout roses along 9th street framing the park quite nicely and giving it a peaceful pocket park feel.